Veteran political strategist James Carville turned a boast by House Speaker Mike Johnson (R-LA) about Congress into a punchline by simply agreeing with him.On the latest episode of "Politics War Room," Carville and co-host Al Hunt zeroed in on Johnson's claim that the current Congress was the most productive since Harry Truman's in 1948, a comparison that collapsed the moment anyone checked the history. Carville and Hunt were sizing up Republica…