What is the threshold for winning a primary in Michigan’s U.S. Senate race?

In Michigan, the threshold for winning a primary election, including the U.S. Senate race, is a plurality of the votes cast. Michigan does not require a majority (over 50%) to win a primary; the candidate with the highest number of votes, even if less than half, wins the nomination. This is governed by Michigan Election Law, Act 116 of 1954, Section 168.559, which provides for a plurality-based system in partisan primaries without runoffs.

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