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 ...

Republican leaders projected confidence Thursday that they will keep control of the U.S. House as more races were decided in their favor, while Democrats insisted they still see a path toward the majority and sought assurances every vote will be counted.