Michigan voters will decide a competitive Democratic U.S. Senate primary Tuesday, testing the growing clout of the party's progressive wing as well as that of a powerful pro-Israel organization. As of July 6, there were about 8.3 million registered voters in Michigan. About 63% of the vote in the 2024 state primary was cast early in-person or by mail. More than 1 million ballots had already been cast in Tuesday's election. More than $30 million since June in support of Stevens and against El-Sayed. Polls in most of the state are in the Eastern time zone and close at 8 p.m. ET. Some polls in the Upper Peninsula along the Wisconsin border are in Central time and close at 9 p.m. ET.