WEST COLUMBIA, S.C. -- President Donald Trump revisited past battles Monday night as he rallied supporters behind South Carolina's Republican governor ahead of a tense runoff election.

• Trump urged voters to support McMaster in runoff election.
• President arrived an hour late due to storms.

Trump urged Republicans to back Gov. Henry McMaster in Tuesday's contest for the GOP nomination.

In encouraging McMaster's election, Trump told supporters, "So please, get your a---- out tomorrow and vote.''

The president also dug into favorite conflicts, including tough trade negotiations with U.S. allies, his ongoing fight with Democrats over immigration and his 2016 election victory.

Trump arrived an hour late after storms forced Air Force One to circle South Carolina's capital city.

Trump pointed to his frequent nemesis, the news media, and warned that a loss for McMaster, who backed Trump in early 2016, would be portrayed as a defeat for him.