A river-bound peninsula that votes among Illinois's most lopsided margins
Calhoun County, wedged between the Illinois and Mississippi rivers with no bridge access on one side, is one of Illinois's least populous counties and has shifted decisively toward Republican presidential candidates over the past two decades, posting a 55-point margin in 2024.
Contextual statewide polling for Illinois. County pages stay rooted in county returns, but live statewide polling helps frame the current cycle.