By Alexandra Ulmer KENNESAW, Ga. (Reuters) – Former Vice President Mike Pence campaigned for one of his ex-boss’ nemeses on Monday night in the Republican primary for governor of Georgia, urging voters not to dwell on the past. Ahead of Tuesday’s voting, Pence did not directly criticize former President Donald Trump in a speech on behalf of incumbent Brian Kemp nor name David Perdue, the former senator whom Trump has backed in the race. “Elections are about the future. There are those who want to make this election about the past,” Pence said, speaking in an airport hangar to a crowd of severa…