LANSING, Mich (WLMI) Michigan residents who want to participate in the August 7th primary election have just a few days left to register to vote. Monday is the deadline to register for the primary election. A big state race—4 Republicans are running for the chance to take on Democratic U.S. Sen. Debbie Stabenow. Contests for U.S. House and other races also will be on the ballot. Register by mail or at any Secretary of State office.