There are 17 months before Michigan's gubernatorial race, and an already crowded field of candidates has grown by one.
Patrick Colbeck, a conservative state senator who has opposed Gov. Rick Snyder on Medicaid expansion and higher fuel taxes to better fund roads, announced Thursday that he has filed paperwork to seek the governorship.
Snyder, a Republican, cannot run again for the state Senate due to term limits.
Colbeck was first elected to the Senate in the 2010 tea party wave.