William Lawrence, a progressive insurgent, upset the Democratic establishment Tuesday to win the tense primary to run against Rep. Tom Barrett (R-MI), possibly thwarting one of the top pickup opportunities for Democrats in November.

Lawrence led with a plurality of the vote in the three-way field, 43%, when the Associated Press called the race at 11:23 p.m. Former U.S. Ambassador to Ukraine Bridget Brink had 29%, while former Navy SEAL Matt Maasdam had 28%. 55% of the vote was tabulated when the race was called.

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