24/7 Wall St. Insights

• This election cycle, Harris and Trump campaigns are focusing their resources on a handful of key swing-states, where the election will likely be decided.
• In most of the rest of the country, including Illinois, the outcome of the race is effectively predetermined.
• However, Illinois’ status as a blue state is an oversimplification that belies a much more nuanced reality.
• Also: 2 Dividend Legends to Hold Forever

Election Day is looming, and in the wake of the first, and perhaps only, presidential debate in the 2024 race, Democrat Kamala Harris is leading Republican Donald Trump in the polls by the widest margin since the start of her campaign. According to a recent national survey conducted by Morning Consult, 51% of Americans now say they would vote for Harris if the election were today, compared to 45% who would support Trump.

However, Harris’ advantage in national polls is only a reflection of current voter sentiment, and public opinion is likely to shift in the coming weeks. Additionally, presidential races are not decided by popular vote, and this election cycle, the outcome will likely hinge on voters in a handful of closely contested swing states. In these states, which include Arizona, Georgia, North Carolina, Pennsylvania, and Wisconsin, both Trump and Harris are polling so closely that either one has a reasonable chance of winning in November. For either candidate to garner the 270 electoral votes necessary to win the White House, they will first need to persuade voters in these and other battleground states. (This is how Trump and Harris are polling in every key swing state.)

Unlike swing states — which are effectively a toss-up – a combination of polling results, the electorate’s political affiliation, and historical voting patterns show that most other states are already a virtual lock for either Trump or Harris. So-called blue states, like Massachusetts and Vermont, are places that Harris can reliably count on taking in November. Meanwhile, red states like Idaho and Wyoming are Republican strongholds that Trump will likely win handily.

Because the electoral outcome is effectively predetermined, these and other non-swing states are often characterized as political monoliths, home to populations of like-minded voters with similar values and priorities. This, however, is an oversimplification that belies a much more nuanced reality.

In Illinois, long considered a blue state, an average of 58.2% of voters have supported the Democratic candidate across the last four presidential elections. In fact, Illinois has gone to the Democratic candidate in every presidential election since 1988, when George H.W. Bush, a Republican, defeated Democrat Michael Dukakis. Barring any major, unforeseen shakeup, Illinois is expected to align with historical voting patterns once again in 2024 and go to Harris. (Here is a look at the 15 least popular presidents, according to Millennials.)

Despite its status as a Democratic stronghold, there are several parts of the state that have consistently broken with the prevailing political ideology in recent elections. According to voting records, there are 34 counties in Illinois where an average of at least 65% of voters have supported the Republican candidate across the last four presidential elections. In one of these counties, an average of 78.5% of voters cast ballots for the Republican candidate over the same four general elections. All historical, county-level, voting statistics are from the MIT Election Data and Science Lab’s County Presidential Election Returns 2000-2020 database, as compiled in the Harvard Dataverse, V13.

These are the most Republican counties in Illinois.

Why It Matters

Because of the electoral college system, the outcome of presidential elections often comes down to voters in just a handful of closely contested states. In contrast to these battleground states, most of the country has reliably voted either Democratic or Republican in recent presidential elections. These states include Illinois, which, barring any unforeseen shake ups in the race, is all but guaranteed to go to Harris in 2024. Still, Illinois is not the partisan monolith it is often perceived to be.

34. Livingston County

• Average popular vote split in last 4 presidential elections: 31.4% Democratic; 65.5% Republican
• Popular vote split in 2020 election: 26.9% Democrat (Joe Biden); 71.1% Republican (Donald Trump)
• Popular vote split in 2016 election: 26.3% Democrat (Hillary Clinton); 66.9% Republican (Donald Trump)
• Popular vote split in 2012 election: 33.4% Democrat (Barack Obama); 64.9% Republican (Mitt Romney)
• Popular vote split in 2008 election: 39.6% Democrat (Barack Obama); 58.8% Republican (John McCain)
• County population: 35,771

33. Saline County

• Average popular vote split in last 4 presidential elections: 31.7% Democratic; 65.7% Republican
• Popular vote split in 2020 election: 25.2% Democrat (Joe Biden); 73.2% Republican (Donald Trump)
• Popular vote split in 2016 election: 22.6% Democrat (Hillary Clinton); 72.7% Republican (Donald Trump)
• Popular vote split in 2012 election: 34.5% Democrat (Barack Obama); 63.5% Republican (Mitt Romney)
• Popular vote split in 2008 election: 44.5% Democrat (Barack Obama); 53.4% Republican (John McCain)
• County population: 23,662

32. Moultrie County

• Average popular vote split in last 4 presidential elections: 31.4% Democratic; 65.8% Republican
• Popular vote split in 2020 election: 24.6% Democrat (Joe Biden); 73.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 23.6% Democrat (Hillary Clinton); 70.9% Republican (Donald Trump)
• Popular vote split in 2012 election: 35.4% Democrat (Barack Obama); 62.5% Republican (Mitt Romney)
• Popular vote split in 2008 election: 42.6% Democrat (Barack Obama); 55.4% Republican (John McCain)
• County population: 14,531

31. Clark County

• Average popular vote split in last 4 presidential elections: 31.5% Democratic; 66.0% Republican
• Popular vote split in 2020 election: 23.9% Democrat (Joe Biden); 74.5% Republican (Donald Trump)
• Popular vote split in 2016 election: 23.7% Democrat (Hillary Clinton); 70.9% Republican (Donald Trump)
• Popular vote split in 2012 election: 33.0% Democrat (Barack Obama); 65.4% Republican (Mitt Romney)
• Popular vote split in 2008 election: 45.1% Democrat (Barack Obama); 53.2% Republican (John McCain)
• County population: 15,467

30. Clinton County

• Average popular vote split in last 4 presidential elections: 30.8% Democratic; 66.2% Republican
• Popular vote split in 2020 election: 23.4% Democrat (Joe Biden); 74.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 22.6% Democrat (Hillary Clinton); 71.3% Republican (Donald Trump)
• Popular vote split in 2012 election: 34.0% Democrat (Barack Obama); 64.0% Republican (Mitt Romney)
• Popular vote split in 2008 election: 44.2% Democrat (Barack Obama); 54.0% Republican (John McCain)
• County population: 36,998

29. Greene County

• Average popular vote split in last 4 presidential elections: 31.0% Democratic; 66.3% Republican
• Popular vote split in 2020 election: 21.7% Democrat (Joe Biden); 76.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 21.6% Democrat (Hillary Clinton); 74.2% Republican (Donald Trump)
• Popular vote split in 2012 election: 36.0% Democrat (Barack Obama); 61.4% Republican (Mitt Romney)
• Popular vote split in 2008 election: 45.1% Democrat (Barack Obama); 52.6% Republican (John McCain)
• County population: 12,015

28. Edgar County

• Average popular vote split in last 4 presidential elections: 31.1% Democratic; 66.5% Republican
• Popular vote split in 2020 election: 23.0% Democrat (Joe Biden); 75.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 22.8% Democrat (Hillary Clinton); 71.7% Republican (Donald Trump)
• Popular vote split in 2012 election: 32.8% Democrat (Barack Obama); 65.6% Republican (Mitt Romney)
• Popular vote split in 2008 election: 45.3% Democrat (Barack Obama); 53.3% Republican (John McCain)
• County population: 16,852

27. Lawrence County

• Average popular vote split in last 4 presidential elections: 30.9% Democratic; 66.6% Republican
• Popular vote split in 2020 election: 22.1% Democrat (Joe Biden); 76.2% Republican (Donald Trump)
• Popular vote split in 2016 election: 21.2% Democrat (Hillary Clinton); 74.2% Republican (Donald Trump)
• Popular vote split in 2012 election: 33.6% Democrat (Barack Obama); 64.4% Republican (Mitt Romney)
• Popular vote split in 2008 election: 46.1% Democrat (Barack Obama); 52.1% Republican (John McCain)
• County population: 15,302

26. Woodford County

• Average popular vote split in last 4 presidential elections: 29.9% Democratic; 66.7% Republican
• Popular vote split in 2020 election: 28.7% Democrat (Joe Biden); 69.1% Republican (Donald Trump)
• Popular vote split in 2016 election: 25.6% Democrat (Hillary Clinton); 66.5% Republican (Donald Trump)
• Popular vote split in 2012 election: 29.5% Democrat (Barack Obama); 68.7% Republican (Mitt Romney)
• Popular vote split in 2008 election: 35.9% Democrat (Barack Obama); 62.6% Republican (John McCain)
• County population: 38,414

25. Crawford County

• Average popular vote split in last 4 presidential elections: 30.5% Democratic; 66.8% Republican
• Popular vote split in 2020 election: 23.4% Democrat (Joe Biden); 74.7% Republican (Donald Trump)
• Popular vote split in 2016 election: 22.8% Democrat (Hillary Clinton); 71.9% Republican (Donald Trump)
• Popular vote split in 2012 election: 33.2% Democrat (Barack Obama); 64.9% Republican (Mitt Romney)
• Popular vote split in 2008 election: 42.5% Democrat (Barack Obama); 55.5% Republican (John McCain)
• County population: 18,729

24. Douglas County

• Average popular vote split in last 4 presidential elections: 30.0% Democratic; 67.1% Republican
• Popular vote split in 2020 election: 26.7% Democrat (Joe Biden); 71.3% Republican (Donald Trump)
• Popular vote split in 2016 election: 23.9% Democrat (Hillary Clinton); 69.8% Republican (Donald Trump)
• Popular vote split in 2012 election: 30.8% Democrat (Barack Obama); 67.5% Republican (Mitt Romney)
• Popular vote split in 2008 election: 38.6% Democrat (Barack Obama); 59.9% Republican (John McCain)
• County population: 19,714

23. Scott County

• Average popular vote split in last 4 presidential elections: 29.6% Democratic; 67.8% Republican
• Popular vote split in 2020 election: 20.9% Democrat (Joe Biden); 77.2% Republican (Donald Trump)
• Popular vote split in 2016 election: 20.5% Democrat (Hillary Clinton); 75.4% Republican (Donald Trump)
• Popular vote split in 2012 election: 35.6% Democrat (Barack Obama); 62.1% Republican (Mitt Romney)
• Popular vote split in 2008 election: 41.9% Democrat (Barack Obama); 56.0% Republican (John McCain)
• County population: 4,899

22. Adams County

• Average popular vote split in last 4 presidential elections: 29.7% Democratic; 67.9% Republican
• Popular vote split in 2020 election: 25.7% Democrat (Joe Biden); 72.2% Republican (Donald Trump)
• Popular vote split in 2016 election: 24.0% Democrat (Hillary Clinton); 71.3% Republican (Donald Trump)
• Popular vote split in 2012 election: 31.5% Democrat (Barack Obama); 66.7% Republican (Mitt Romney)
• Popular vote split in 2008 election: 38.3% Democrat (Barack Obama); 60.7% Republican (John McCain)
• County population: 65,583

21. Massac County

• Average popular vote split in last 4 presidential elections: 29.7% Democratic; 68.0% Republican
• Popular vote split in 2020 election: 25.3% Democrat (Joe Biden); 73.3% Republican (Donald Trump)
• Popular vote split in 2016 election: 23.3% Democrat (Hillary Clinton); 72.5% Republican (Donald Trump)
• Popular vote split in 2012 election: 32.2% Democrat (Barack Obama); 65.9% Republican (Mitt Romney)
• Popular vote split in 2008 election: 37.5% Democrat (Barack Obama); 60.8% Republican (John McCain)
• County population: 14,135

20. Richland County

• Average popular vote split in last 4 presidential elections: 29.2% Democratic; 68.2% Republican
• Popular vote split in 2020 election: 22.7% Democrat (Joe Biden); 75.5% Republican (Donald Trump)
• Popular vote split in 2016 election: 20.6% Democrat (Hillary Clinton); 74.7% Republican (Donald Trump)
• Popular vote split in 2012 election: 32.4% Democrat (Barack Obama); 65.3% Republican (Mitt Romney)
• Popular vote split in 2008 election: 41.6% Democrat (Barack Obama); 56.6% Republican (John McCain)
• County population: 15,716

19. Washington County

• Average popular vote split in last 4 presidential elections: 29.0% Democratic; 68.3% Republican
• Popular vote split in 2020 election: 20.8% Democrat (Joe Biden); 77.4% Republican (Donald Trump)
• Popular vote split in 2016 election: 19.5% Democrat (Hillary Clinton); 75.0% Republican (Donald Trump)
• Popular vote split in 2012 election: 33.1% Democrat (Barack Obama); 64.7% Republican (Mitt Romney)
• Popular vote split in 2008 election: 42.1% Democrat (Barack Obama); 56.4% Republican (John McCain)
• County population: 13,781

18. Wabash County

• Average popular vote split in last 4 presidential elections: 29.4% Democratic; 68.3% Republican
• Popular vote split in 2020 election: 22.4% Democrat (Joe Biden); 75.8% Republican (Donald Trump)
• Popular vote split in 2016 election: 21.1% Democrat (Hillary Clinton); 74.1% Republican (Donald Trump)
• Popular vote split in 2012 election: 31.0% Democrat (Barack Obama); 67.7% Republican (Mitt Romney)
• Popular vote split in 2008 election: 42.6% Democrat (Barack Obama); 56.3% Republican (John McCain)
• County population: 11,321

17. White County

• Average popular vote split in last 4 presidential elections: 28.8% Democratic; 68.8% Republican
• Popular vote split in 2020 election: 20.4% Democrat (Joe Biden); 78.0% Republican (Donald Trump)
• Popular vote split in 2016 election: 19.3% Democrat (Hillary Clinton); 76.9% Republican (Donald Trump)
• Popular vote split in 2012 election: 31.0% Democrat (Barack Obama); 67.0% Republican (Mitt Romney)
• Popular vote split in 2008 election: 44.5% Democrat (Barack Obama); 53.5% Republican (John McCain)
• County population: 13,834

16. Brown County

• Average popular vote split in last 4 presidential elections: 27.8% Democratic; 69.0% Republican
• Popular vote split in 2020 election: 19.3% Democrat (Joe Biden); 76.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 20.0% Democrat (Hillary Clinton); 75.5% Republican (Donald Trump)
• Popular vote split in 2012 election: 33.3% Democrat (Barack Obama); 64.0% Republican (Mitt Romney)
• Popular vote split in 2008 election: 38.4% Democrat (Barack Obama); 60.1% Republican (John McCain)
• County population: 6,334

15. Hamilton County

• Average popular vote split in last 4 presidential elections: 28.1% Democratic; 69.3% Republican
• Popular vote split in 2020 election: 19.1% Democrat (Joe Biden); 79.5% Republican (Donald Trump)
• Popular vote split in 2016 election: 19.3% Democrat (Hillary Clinton); 77.0% Republican (Donald Trump)
• Popular vote split in 2012 election: 32.2% Democrat (Barack Obama); 65.1% Republican (Mitt Romney)
• Popular vote split in 2008 election: 42.1% Democrat (Barack Obama); 55.2% Republican (John McCain)
• County population: 8,008

14. Ford County

• Average popular vote split in last 4 presidential elections: 27.4% Democratic; 69.3% Republican
• Popular vote split in 2020 election: 25.2% Democrat (Joe Biden); 72.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 22.1% Democrat (Hillary Clinton); 70.0% Republican (Donald Trump)
• Popular vote split in 2012 election: 27.6% Democrat (Barack Obama); 70.4% Republican (Mitt Romney)
• Popular vote split in 2008 election: 34.9% Democrat (Barack Obama); 63.9% Republican (John McCain)
• County population: 13,484

13. Shelby County

• Average popular vote split in last 4 presidential elections: 27.9% Democratic; 69.6% Republican
• Popular vote split in 2020 election: 20.7% Democrat (Joe Biden); 77.9% Republican (Donald Trump)
• Popular vote split in 2016 election: 20.8% Democrat (Hillary Clinton); 74.7% Republican (Donald Trump)
• Popular vote split in 2012 election: 32.2% Democrat (Barack Obama); 65.8% Republican (Mitt Romney)
• Popular vote split in 2008 election: 39.1% Democrat (Barack Obama); 58.9% Republican (John McCain)
• County population: 21,042

12. Hardin County

• Average popular vote split in last 4 presidential elections: 28.1% Democratic; 69.8% Republican
• Popular vote split in 2020 election: 20.8% Democrat (Joe Biden); 78.2% Republican (Donald Trump)
• Popular vote split in 2016 election: 19.6% Democrat (Hillary Clinton); 77.0% Republican (Donald Trump)
• Popular vote split in 2012 election: 31.8% Democrat (Barack Obama); 65.9% Republican (Mitt Romney)
• Popular vote split in 2008 election: 39.6% Democrat (Barack Obama); 59.0% Republican (John McCain)
• County population: 3,665

11. Fayette County

• Average popular vote split in last 4 presidential elections: 27.3% Democratic; 70.2% Republican
• Popular vote split in 2020 election: 18.2% Democrat (Joe Biden); 80.1% Republican (Donald Trump)
• Popular vote split in 2016 election: 19.0% Democrat (Hillary Clinton); 76.9% Republican (Donald Trump)
• Popular vote split in 2012 election: 31.8% Democrat (Barack Obama); 66.3% Republican (Mitt Romney)
• Popular vote split in 2008 election: 41.0% Democrat (Barack Obama); 56.8% Republican (John McCain)
• County population: 21,464

10. Cumberland County

• Average popular vote split in last 4 presidential elections: 26.7% Democratic; 70.3% Republican
• Popular vote split in 2020 election: 19.6% Democrat (Joe Biden); 78.9% Republican (Donald Trump)
• Popular vote split in 2016 election: 18.5% Democrat (Hillary Clinton); 75.6% Republican (Donald Trump)
• Popular vote split in 2012 election: 31.0% Democrat (Barack Obama); 66.3% Republican (Mitt Romney)
• Popular vote split in 2008 election: 38.6% Democrat (Barack Obama); 59.3% Republican (John McCain)
• County population: 10,447

9. Pike County

• Average popular vote split in last 4 presidential elections: 27.0% Democratic; 70.4% Republican
• Popular vote split in 2020 election: 18.7% Democrat (Joe Biden); 79.7% Republican (Donald Trump)
• Popular vote split in 2016 election: 18.8% Democrat (Hillary Clinton); 76.4% Republican (Donald Trump)
• Popular vote split in 2012 election: 31.3% Democrat (Barack Obama); 66.7% Republican (Mitt Romney)
• Popular vote split in 2008 election: 39.7% Democrat (Barack Obama); 58.5% Republican (John McCain)
• County population: 14,776

8. Pope County

• Average popular vote split in last 4 presidential elections: 26.3% Democratic; 71.3% Republican
• Popular vote split in 2020 election: 19.9% Democrat (Joe Biden); 79.2% Republican (Donald Trump)
• Popular vote split in 2016 election: 17.5% Democrat (Hillary Clinton); 78.3% Republican (Donald Trump)
• Popular vote split in 2012 election: 29.3% Democrat (Barack Obama); 68.0% Republican (Mitt Romney)
• Popular vote split in 2008 election: 37.9% Democrat (Barack Obama); 60.2% Republican (John McCain)
• County population: 3,799

7. Jasper County

• Average popular vote split in last 4 presidential elections: 26.0% Democratic; 71.6% Republican
• Popular vote split in 2020 election: 18.1% Democrat (Joe Biden); 80.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 18.0% Democrat (Hillary Clinton); 77.4% Republican (Donald Trump)
• Popular vote split in 2012 election: 28.5% Democrat (Barack Obama); 69.7% Republican (Mitt Romney)
• Popular vote split in 2008 election: 40.2% Democrat (Barack Obama); 57.8% Republican (John McCain)
• County population: 9,295

6. Iroquois County

• Average popular vote split in last 4 presidential elections: 25.2% Democratic; 71.9% Republican
• Popular vote split in 2020 election: 20.7% Democrat (Joe Biden); 77.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 19.2% Democrat (Hillary Clinton); 74.6% Republican (Donald Trump)
• Popular vote split in 2012 election: 26.7% Democrat (Barack Obama); 71.3% Republican (Mitt Romney)
• Popular vote split in 2008 election: 34.1% Democrat (Barack Obama); 64.0% Republican (John McCain)
• County population: 27,043

5. Johnson County

• Average popular vote split in last 4 presidential elections: 24.3% Democratic; 73.0% Republican
• Popular vote split in 2020 election: 19.9% Democrat (Joe Biden); 78.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 18.8% Democrat (Hillary Clinton); 76.4% Republican (Donald Trump)
• Popular vote split in 2012 election: 27.7% Democrat (Barack Obama); 69.9% Republican (Mitt Romney)
• Popular vote split in 2008 election: 31.7% Democrat (Barack Obama); 66.3% Republican (John McCain)
• County population: 13,313

4. Clay County

• Average popular vote split in last 4 presidential elections: 24.1% Democratic; 73.3% Republican
• Popular vote split in 2020 election: 16.4% Democrat (Joe Biden); 81.7% Republican (Donald Trump)
• Popular vote split in 2016 election: 16.1% Democrat (Hillary Clinton); 79.1% Republican (Donald Trump)
• Popular vote split in 2012 election: 26.8% Democrat (Barack Obama); 70.9% Republican (Mitt Romney)
• Popular vote split in 2008 election: 37.6% Democrat (Barack Obama); 60.8% Republican (John McCain)
• County population: 13,248

3. Effingham County

• Average popular vote split in last 4 presidential elections: 22.7% Democratic; 74.8% Republican
• Popular vote split in 2020 election: 19.5% Democrat (Joe Biden); 78.8% Republican (Donald Trump)
• Popular vote split in 2016 election: 17.5% Democrat (Hillary Clinton); 77.4% Republican (Donald Trump)
• Popular vote split in 2012 election: 23.2% Democrat (Barack Obama); 75.2% Republican (Mitt Romney)
• Popular vote split in 2008 election: 31.3% Democrat (Barack Obama); 67.3% Republican (John McCain)
• County population: 34,594

2. Edwards County

• Average popular vote split in last 4 presidential elections: 21.2% Democratic; 76.4% Republican
• Popular vote split in 2020 election: 14.5% Democrat (Joe Biden); 84.2% Republican (Donald Trump)
• Popular vote split in 2016 election: 13.0% Democrat (Hillary Clinton); 83.0% Republican (Donald Trump)
• Popular vote split in 2012 election: 23.4% Democrat (Barack Obama); 74.5% Republican (Mitt Romney)
• Popular vote split in 2008 election: 34.0% Democrat (Barack Obama); 63.8% Republican (John McCain)
• County population: 6,182

1. Wayne County

• Average popular vote split in last 4 presidential elections: 19.4% Democratic; 78.5% Republican
• Popular vote split in 2020 election: 14.0% Democrat (Joe Biden); 84.6% Republican (Donald Trump)
• Popular vote split in 2016 election: 12.7% Democrat (Hillary Clinton); 84.3% Republican (Donald Trump)
• Popular vote split in 2012 election: 19.7% Democrat (Barack Obama); 78.0% Republican (Mitt Romney)
• Popular vote split in 2008 election: 31.6% Democrat (Barack Obama); 66.8% Republican (John McCain)
• County population: 16,127

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