Former President Donald Trump is putting the Republican Party’s already-imperiled House majority on a course for defeat this fall, MSNBC analyst John Heilemann argued on Friday evening. This comes as Trump boosts House Speaker Mike Johnson (R-LA) in a joint press conference at Mar-a-Lago, all while the GOP suffers from infighting, retirements, and resignations, special election losses, and are put on the defensive by public outrage over abortion bans around the country — and as many of them continue to double down on support for election lies and the January 6 defendants. “When we compared to …