President Trump told the Justice Department to intervene in the race, where polling shows Republicans at risk of losing a seat.

© Kerry Tasker/Reuters

No obvious legal authority supports a pre-emptive effort to block the certification of Alaska’s Senate election if the Republican incumbent narrowly loses.

© Kerry Tasker for The New York Times

The department, in a highly unusual lawsuit, argued that confusion over candidates with similar names could taint the election result.

© Doug Mills/The New York Times

The Republican incumbent, Dan Sullivan, and his Democratic challenger, Mary Peltola, veered from serious discussion of high prices and economic challenges to blistering personal attacks.

© Matt Faubion/Alaska Public Media