On November 29, the Michigan Senate Elections Committee passed SB 1207, which moves the presidential primary from the second Tuesday in March to the second Tuesday in February. Later in the day, the Senate passed the bill, 34-1. The sponsor is a Republican but the bill had bipartisan support in the Senate. UPDATE: see this analysis of the bill from FrontloadingHQ.

The date of the Michigan presidential primary has no bearing on any petition deadlines, nor on the primary for non-presidential office, which would continue to be in August.

In 2020, New Hampshire held its presidential primary on the second Tuesday in February. If Michigan SB 1207 passes, the New Hampshire primary will move into January. The New Hampshire Secretary of State controls the date of the New Hampshire presidential primary; no legislative action is needed in New Hampshire.

The Michigan legislature adjourns soon, so if the bill is to pass in this session, the House will need to act quickly.