Joe Biden is heading south. The former vice president abruptly announced on Tuesday morning that he won’t spend primary night in New Hampshire as planned and instead is flying to South Carolina to headline a newly scheduled kick-off rally in the state he’s long considered his campaign firewall. “We’re going to head to South Carolina tonight,” Biden told reporters as he visited a polling station with voting underway in the state that holds the first primary in the race for the White House. “And I’m going to Nevada… we’ve got to look at them all.” The campaign confirmed Biden is...