AP projects Sean Casten to win Illinois' 6th Congressional District, unseating six-term congressman Roskam

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Democrat Sean Casten has defeated six-term Republican Rep. Peter Roskam to flip a suburban Chicago district the GOP has held for more than four decades.

Democrat Sean Casten has defeated six-term Republican Rep. Peter Roskam to flip a suburban Chicago district the GOP has held for more than four decades.

Democrats targeted the seat in Chicago's west and northwest suburbs in an effort to win control of the House. It was Roskam's toughest challenge since the Wheaton lawmaker was first elected to Congress in 2006.

Casten, a scientist and businessman from Downers Grove, argued Roskam was too conservative for a district that supported Hillary Clinton over President Donald Trump in 2016. He pointed to Roskam's record of opposing abortion and his record of voting along with Trump.

Roskam insisted he's a moderate who opposed Trump when necessary. He criticized Casten as wanting to raise taxes and for name-calling and "embracing the politics of ridicule."

But upon his defeat, Roskam told ABC7 Eyewitness News he and his team planned to cooperate with Casten to ensure a smooth transition.

"When I called him I told him he's going to love this job," Roskam said. "It's a great privilege to reflect a constituency in the U.S. House of Representatives, and I wish him well."
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