Inundated with boos from a raucous town hall crowd, Sen. Lindsey O. Graham (R-S.C.) snapped back, lashing out at one attendee for asking a “garbage” question and slamming many for not accepting the result of the 2016 presidential election. Toward the end of the hour-long town hall in Columbia, S.C., people were standing up. “Your last term! Your last term!” they chanted. The senator fired back, telling the crowd that he does not and will not worry about losing his job in the 2020 election. “Good! Good! Come on, bring it on! Bring it on!” Graham said. “If I win,...