The Brief Michigan’s primary election is today. Michigan’s primary election is today, Tuesday, Aug. 4 and polls are now open. Here’s what you need to know: :Michigan’s primary electionThe primary election is today, Aug. 4. Big picture view:All registered voters in Michigan can vote at their polling place on Election Day. Republicans haven’t won a U.S. Senate seat in Michigan since 1994, though Rogers came within 20,000 votes of doing so in 2024.