Stephen Colbert’s old friend Triumph the Insult Comic Dog stopped by the Late Show couch last night to promote his Hulu election special, which is earning rave reviews, and not just from the critics he bribed. But what makes an insult comic dog with no previous political experience suitable to go cover the campaign trail? As Triumph told Colbert, he did his homework: He read all the candidates’ books, from Donald Trump’s Pride and Prejudice: Now With More Prejudice to Jeb Bush’s Leading to Courage, America, Freedom … Future … Ah, F— It. I’m Out. Woof.