Alaska. even if she votes in favor of witnesses, that would present a 50-50 tie. that would make a very small possibility that chief justice roberts would break the tie for witnesses. i don't think that would happen. >> zero chance of that happening. >> it has been done before in an impeachment trial. >> it has been done. it was done twice in 1868 by chief justice chase. immediately after that, senator sumner of massachusetts made a motion, in essence, to amend the impeachment rules to deny the vice president the authority to vote, which authority was not explicitly granted. that motion failed...