A wave of apprehension and anguish swept the Republican Party on Thursday, with many GOP leaders alarmed by Donald Trump’s refusal to accept the outcome of the election and concluding that it is probably too late to salvage his flailing presidential campaign. As the Republican nominee reeled from a turbulent performance in the final debate here in Las Vegas, his party’s embattled senators and House members scrambled to protect their seats and preserve the GOP’s congressional majorities against what Republicans privately acknowledge could be a landslide victory for Democratic nominee Hillary Clinton. With 19 days until the election, the Republican Party is in a state of historic turmoil, encapsulated by Trump’s extraordinary debate declaration that he would leave the nation in “suspense” about whether he would recognize the results from an election he has claimed will be “rigged” or even “stolen.”