House Speaker Paul Ryan administers the House oath of office to Rep. Josh Gottheimer, D-N.J., during a mock swearing in ceremony on Capitol Hill on Jan. 3, 2017 After taking the oath of office Tuesday, Democrat Josh Gottheimer became the newest member of the New Jersey congressional delegation. In one of the few bright spots for Democrats in the November election, Gottheimer unseated 7-term Republican Scott Garrett in New Jersey’s 5th congressional district.