DENVER, Colo. — Megan Carpentier had the hook-up of the entire convention: Rachel Maddow, interviewed for Jez. She was kind enough to let me tag along. Really have to say: as cool as she seems on television, she’s even cooler in person, particularly after I mealy-mouthed through a question. I won’t step on Megan’s interview, but I came away from hanging out on the MSNBC soundstage behind Union Station convinced that her TV show will be a watershed moment for liberalism in this country.