Dem Casten upsets Roskam to flip Illinois House seat

Dem Casten upsets Roskam to flip Illinois House seat

Sean Casten, a clean-energy executive, pulled off a major upset Tuesday, unseating six-term GOP Rep. Peter Roskam Peter James RoskamBlue states angry over SALT cap should give fiscal sobriety a try Illinois Dems offer bill to raise SALT deduction cap Illinois New Members 2019 MORE in Illinois's 6th Congressional District.

It was one of the most hotly-contested races in the country, with Democrats making the seat one of their top targets.

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The wealthy suburban Chicago district has traditionally leaned red and Roskam handily won reelection in 2016. But the district also voted for Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonDe Blasio pitches himself as tough New Yorker who can take on 'Don the con' From dive bars to steakhouses: How Iowa caucus staffers blow off steam Warren policy ideas show signs of paying off MORE by 7 points that year.

Polls showed Casten with a slight edge over the incumbent in the days leading up to the vote. The Cook Political Report also put the race in the "Lean Democratic" column and Democrats outspent Republicans in the race.

In an election that has widely been seen as a referendum on President TrumpDonald John TrumpTrump: 'I will not let Iran have nuclear weapons' Rocket attack hits Baghdad's Green Zone amid escalating tensions: reports Buttigieg on Trump tweets: 'I don't care' MORE, Roskam also found himself under attack over his role in helping pass the Republican tax law. Roskam sits on the powerful House Ways and Means Committee, which writes tax laws.