Democratic Rep. Elissa Slotkin won Michigan’s shotgun-tight race for U.S. Senate, defeating former Republican congressman Mike Rogers in a battle of attrition.

Rep. Elissa Slotkin will win the competitive Michigan Senate race, CNN projects, keeping the seat in Democratic hands and making her the youngest Democratic woman elected to the Senate.

Rep. Elissa Slotkin defeated Republican Mike Rogers to win a Senate seat to represent Michigan in one of the election’s most high-profile races, the Associated Press said Wednesday afternoon. The call came after Republicans had already flipped control of the Senate with wins in West Virginia,

Republicans currently hold the majority in the House, while Democrats have the Senate. A handful of tight matchups could swing the balance of power.

This year’s elections has a raft of competitive races in the House and Senate, as well as several gubernatorial contests around the country. The Senate is all but likely to fall under Republican control when it’s all said and done,