Republican Ron Estes, Kansas’ state treasurer, on Tuesday won the House seat left vacant when Mike Pompeo stepped down to become CIA director. Estes survived a surprisingly competitive race against Democrat James Thompson, a Wichita civil rights lawyer, in a vote that was seen as an early test of the GOP’s strength after President Trump’s first few months in office. Estes won 53 percent to 46 percent after a late rush of help from the national party, including an election eve rally by Sen. Ted Cruz (R-Texas) and get-out-the-vote robocalls by Trump and Vice President Mike Pence, after late polls showed Estes’ lead down to single digits in a district Republicans have held firmly for two decades. In November, Trump won the district by 27 points, and Pompeo won re-election by 32 percentage points.