Jackson, 58, toppled the five-term incumbent in one of the biggest upsets of the midterms, The Guardian reports. Collins has been in the Senate since 1997, the paper says.

“We did it. Working people won,” Jackson said at a victory party in Maine, The Guardian reports. “Maine, I owe you everything,” he wrote on X, according to Fox News.

Maine Democrats picked Jackson as their nominee in July, CBS reports. That came after the party's first nominee, Graham Platner, withdrew following an allegation of sexual assault, CBS says. Jackson had lost a bid for governor earlier this year.

Collins was the only Republican incumbent seeking reelection in a state Kamala Harris won in 2024, CBS reports. That made the race Democrats' clearest pickup chance, CBS says.

Collins questioned Jackson's record as a lawmaker and pointed to the influence she had built in the Senate for Maine, CBS reports. Jackson argued she had not gone far enough in opposing the president, CBS says. He focused on her support for Supreme Court Justice Brett Kavanaugh, whose confirmation paved the way for overturning the federal right to an abortion.

Jackson ran on a platform of progressive economic populism, The Guardian reports. The race was marked by mutual accusations of corruption and clashes over living costs, the paper says.

Collins conceded in a statement. “It has been the honor of my life to serve the people of Maine in the United States Senate,” she wrote, Fox reports.

Collins often pointed to the federal money she had helped steer home as chair of the Senate appropriations committee, The Guardian reports.

What we know: CBS News and Fox News project that Jackson defeated Collins.
What we don't: The final vote margin, which the cited reports do not give.