CNN’s Sara Sidner was blown away by the extent to which Rep. Marjorie Taylor Greene (R-GA) is derailing House Speaker Mike Johnson (R-LA) in his plans to bring a vote on Ukraine funding in the House. Greene, who categorically opposes any assistance to Ukraine, has called Johnson “a damn fool and a liar,” threatened to call a vote to expel him from leadership, and is even insinuating he’s being blackmailed. “Those are some really nasty, strong words, and I know a top Republican has called her a member of the ‘chaos caucus,”’ Sidner said to reporter Lauren Fox. “What’s the speaker going to do a…