WASHINGTON — In the territory Kevin McCarthy once ruled with a wooden, if limp, gavel, Republicans in the House of Representatives spent the week laughing off the former House speaker for meddling in GOP primaries — then getting walloped. McCarthy and his allies were dealt a stunning defeat in the Palmetto State when Rep. Nancy Mace (R-SC) turned heads for destroying her Republican primary opponent by some 27 points. McCarthy’s rarely at the Capitol, but this week, he found his name transformed into a punchline (again). “Anybody that maintains that level of bitterness for that long, I feel sor…