The 44th president sharply criticized Mr. Trump, who hit back later in the day. Mr. Obama also assailed Vivek Ramaswamy, the Republican nominee for governor of Ohio.
With moves in Alaska and California, the department has stepped up interventions in the midterm elections as the president’s instrument of unmediated executive power.
President Trump during a campaign rally in support of Senator Dan S. Sullivan in Wasilla, Alaska, this month. Mr. Trump urged the Justice Dept. to intervene in the Senate race.
Democrats are increasingly optimistic about the midterms. But they are being outspent by Republicans. And they are trying to compete in states that favored President Trump by large margins.
“I knew there was a really good possibility that this would happen,” Blake Miley said. “But I don’t blame myself. It is not right what they did to me.”
The fallout from Vivek Ramaswamy’s brutal spot targeting his Democratic rival in the Ohio governor’s race showed that even in the Trump era, a political attack can be seen as going too far.
No obvious legal authority supports a pre-emptive effort to block the certification of Alaska’s Senate election if the Republican incumbent narrowly loses.