A head to head comparison of the Illinois 2020 General Election gives us an idea of the break down of the voters.
Dick Durbin received 3.3M (58.6 %) votes, beating Mark Curran who gained 2.3M (41.4 %) by 959.1k votes in Illinois.
Dick Durbin won 16 counties out of the 104 counties that make up Illinois. The record shows that Mark Curran won 88 counties.
During the 2020 general elections, over 6M total number of votes were cast. Dick Durbin got 3,278,930 (3M) over Mark Curran 2,319,870 (2M). He won the popular vote by 3,278,930 (3M). His victory in the State of Illinois (with 3,278,930 votes) represents 50.0% of his popular vote victory.
Top 15 Counties in General Elections
All Candidates (Senate General Elections)
These 15 counties play an important role in these Primary elections. If a candidate, can get a sizable majority in the largest counties (Cook, Chicago and Cook Suburbs), it becomes very difficult to win majorities in the smaller counties without voter outreach and increased voter participation in them.
Top 15 Counties Comparison in General Elections
Cook, Chicago and Cook Suburbs, three of the larger counties voted in favor of Dick Durbin, giving him a 2M vote advantage.