Lt. Gov. Pamela Evette and Alan Wilson, the state attorney general, now head to a runoff in the Republican contest for governor. President Trump vowed to “fight” for Ms. Evette in the second round.

© Meg Kinnard/Associated Press

Graham Platner won the Democratic primary for Senate in Maine and quickly turned his populist message against Susan Collins, the Republican incumbent.

© Sophie Park for The New York Times

Nancy Lacore would face a tough fall election in a district drawn in 2021 to be more Republican. She is seeking to replace Representative Nancy Mace, who ran unsuccessfully for governor instead of running for re-election.

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