Republicans flipped Democratic-controlled Senate seats in West Virginia, Ohio, Pennsylvania and Montana. In the latter three cases, defeated Sens. Sherrod Brown, Bob Casey and Jon Tester also ran ahead of Harris but couldn't overcome their states' shifts toward the GOP.

Democrat Reuben Gallego will be heading back to Washington, albeit in a new capacity, after his Senate race against Republican Kari Lake was finally called. The Associated Press determined Gallego, who previously held a seat in the House of Representatives,