Two House Democrats have been ousted by their Republican challengers in Pennsylvania, bolstering the GOP’s chances of defending its slim majority as it inches closer to the 218-seat threshold. Republican candidate Ryan Mackenzie defeated three-term ...

The GOP picked up two more hard-fought seats in Pennsylvania, which became a stark battlefield of Democratic losses up and down the ticket. Democrats notched another win in New York, defeating a third Republican incumbent in that state.

Maine Democrats appear poised to retain a majority in the state House of Representatives and Senate following Tuesday's election despite gains by Republicans who flipped several seats. The preliminary results from Tuesday's legislative races showed Democrats winning at least 77 seats in the 151-member House.

Pennsylvania's Senate contest between Democratic incumbent Bob Casey and Republican challenger David McCormick is still too early to call. McCormick has a roughly 31,000-vote lead, which has been dwindling as outstanding votes continue to be counted.

Pennsylvania saw one of the most expensive Senate races in the country this cycle — and McCormick had early backing from national Republican operatives during the state’s GOP primaries. But Casey has deep ties in Pennsylvania,