President Trump arrives at a campaign rally in Mesa, Ariz., Friday. He has been holding events around the nation in the final weeks of the midterm campaign, but most of his stops are in states that he won in 2016.

President Trump arrives at a campaign rally in Mesa, Ariz., Friday. He has been holding events around the nation in the final weeks of the midterm campaign, but most of his stops are in states that he won in 2016