“ Late Show ” host Stephen Colbert had some mock sympathy for Rep. Nancy Mace (R-S.C.) after an interview in which she indicated she’s not exactly popular with her colleagues. “I’m not part of the powerful, I’m not part of the elite, I’m an island of one,” Mace said after being asked if there’s a cabal of D.C. elites. “I don’t get invited to parties. I don’t have any friends. I have a dog.” Colbert shook his head. “That is so sad. I don’t agree with Mace’s politics, but South Carolinians gotta