Illinois Election Odds — 2026 Live Betting Odds & Voting History

Illinois is the sixth-largest state in the country and one of the most Democratic at the federal level, but the 2024 election delivered the largest pro-Trump swing of any Midwest state — a warning sign that even the Chicago-anchored Democratic base is not as durable as it once was. The 2026 cycle is dominated by two contests: Governor J.B. Pritzker's re-election campaign for an unprecedented third term, and the open Senate seat created by Dick Durbin's retirement after 30 years in office. Both winners are likely to be Democrats, but both races have national implications — Pritzker is a 2028 Democratic presidential contender, and the Senate primary became a proxy fight over the future of the party. National 2028 markets and balance-of-power coverage live on the homepage.

Illinois governor betting odds

J.B. Pritzker is running for an unprecedented third term. Illinois is one of 16 states without gubernatorial term limits, and Pritzker would be the first Illinois governor elected to a third consecutive term since Jim Thompson in 1982. He won the March 17, 2026 Democratic primary unopposed. Because Lieutenant Governor Juliana Stratton is running for Senate (covered below), Pritzker tapped former deputy governor Christian Mitchell as his new running mate.

The general election is a rematch of 2022, when Pritzker defeated former state senator Darren Bailey by 12.5 points. This is the first Illinois gubernatorial rematch since 1986. Bailey, who has spent the intervening years running for Congress and building his rural Illinois base, won the March 17 Republican primary with 54%. Prediction markets are pricing Pritzker as a strong favorite — he won his first two elections by 15.6 and 12.5 points respectively, and the political environment in 2026 has not improved for Republicans in solidly blue states.

The bigger market for Pritzker is his 2028 presidential prospects. Pritzker has openly positioned himself as a national alternative to the moderate wing of the Democratic Party, has spoken at out-of-state events from California to South Carolina, and has been featured in nearly every Democratic 2028 primary market. The size of his Illinois 2026 margin will be read as a signal of his strength heading into a national campaign.

Illinois presidential election betting odds

Illinois has voted Democratic in every presidential election since 1992. Harris won by approximately 10 points in 2024, but the swing toward Trump from 2020 was about 7 points — the largest pro-Trump shift in any Midwest state, and the third-largest among solidly Democratic states behind only New York and California. Most of the shift came from collapsed Democratic turnout in Cook County rather than Republican vote growth.

For 2028, Illinois is not a competitive presidential market, but the state's significance is high because Pritzker is positioning for a national run. Markets pricing him at the 2028 Democratic frontrunner level draw substantial volume on Polymarket. The Illinois Senate primary outcome below — and Pritzker's role in shaping it — was widely covered as a test of his clout heading into a presidential bid.

Illinois senate betting odds

This is the first open Illinois Senate seat since 1996. Dick Durbin, the 80-year-old Senate Minority Whip and second-ranking Senate Democrat, announced his retirement on April 23, 2025 after 30 years in the Senate. The Democratic primary that followed was one of the most expensive and closely watched primaries of the cycle, and the result is being read as a proxy fight over the direction of the national Democratic Party.

Three major candidates ran. Lieutenant Governor Juliana Stratton, who had Pritzker's endorsement and the backing of an Illinois Future PAC funded with $5 million from Pritzker himself, ran on Pritzker's record. Representative Raja Krishnamoorthi entered with $18 million in pre-existing campaign cash and benefited from approximately $10 million in outside spending from Fairshake, the cryptocurrency super PAC. Representative Robin Kelly, former chair of the Illinois Democratic Party, had backing from the Congressional Black Caucus. Stratton won the March 17 primary, and Krishnamoorthi's substantial financial advantage was unable to overcome Pritzker's organizational support.

Stratton is heavily favored in the November general election. The Republican nominee is former Illinois GOP chair Don Tracy. Illinois has not elected a Republican to the Senate since 1992 — Senator Peter Fitzgerald won that year and did not run for re-election in 2004.

Tammy Duckworth, the state's other senator, is not on the 2026 ballot. Her next election is 2028.

Illinois house betting odds

Illinois has 17 House seats, currently split 14 Democrats to 3 Republicans — one of the most Democratic House delegations in the country relative to the state's overall political composition. This is the result of one of the most aggressive Democratic gerrymanders of the 2021 redistricting cycle, which Republicans have publicly cited as justification for the GOP-led mid-decade redistricting in Texas, Ohio, Missouri, and Florida.

Illinois has not moved to redraw its map in response to those efforts. With Democrats already holding 82% of Illinois House seats under the current map, there is little additional room for Democratic gains, and any attempt to redraw the map further would expose the gerrymander to potential federal court challenges. The Democratic-controlled state legislature instead focused on consolidating gains in 2026, defending incumbents in the four marginally competitive districts and supporting flips in the two GOP-held seats in northern and western Illinois that have shown gradual Democratic shift over the past decade.

The Republican-held seats are IL-12 (Mike Bost, southern Illinois, considered safe R), IL-15 (Mary Miller, central Illinois, safe R), and IL-16 (Darin LaHood, north-central Illinois, likely R). Prediction markets are not pricing any of these as competitive in 2026.