In the two states electing new governors this year, New Jersey and Virginia, once-moderate Republicans are running attack ads painting their Democratic opponents as weak on illegal immigration.
Two Democrats are trying to channel anger against the president to win their party's nomination. The GOP front-runner has worked to sidestep Trump as he faces a challenge from his right.
He told supporters in Springfield, Va., that the gap in the number of votes between him and the Democratic incumbent, Sen. Mark Warner, had grown and "I know that a change in outcome is not possible."