Dems seize House control, but GOP retains Senate

Members of the Trumpettes celebrate as incumbent U.S. Sen. Ted Cruz, R-Texas, is announced as the winner over Democratic challenger Rep. Beto O'Rourke in a tightly contested race at the Dallas County Republican Party election night watch party on Tuesday, Nov. 6, 2018 at The Statler Hotel in Dallas. (AP Photo/Jeffrey McWhorter)
Democrat Madeleine Dean celebrates after winning Pennsylvania's 4th Congressional District race, in Fort Washington, Pa., Tuesday, Nov. 6, 2018. (Charles Fox/The Philadelphia Inquirer via AP)
Arizona Gov. Doug Ducey, R, speaks to supporters, Tuesday, Nov. 6, 2018, at an election night party in Scottsdale, Ariz. Incumbent Ducey defeated democratic challenger David Garcia for his second term. (AP Photo/Matt York)

WASHINGTON — Democrats seized the House majority from President Donald Trump’s Republican Party on Tuesday in a suburban revolt that threatened what’s left of the president’s governing agenda. But the GOP gained ground in the Senate and preserved key governorships, beating back a “blue wave” that never fully materialized.