Actor Martin Sheen tore into President Trump with a brutal monologue during a live MSNBC event on Monday, calling the president “the biggest nothing in the world.” The left-leaning Hollywood star gave “the big guy in the White House” some unsolicited advice during a live filming of MSNBC anchor Nicolle Wallace’s podcast, “The Best People.” “You gotta realize, sir, that you are the biggest nothing in the world,” Sheen, 85, said to laughs from the host and the audience. “Stop listening to all