Michigan Gov. Rick Snyder to endorse Romney Michigan Gov. Rick Snyder (R) will endorse Mitt Romney for president at a luncheon on Thursday, according to two sources with knowledge of his decision. MIRS news reported Wednesday evening that the two men will appear together at a luncheon Thursday for a "major announcement." A source confirmed that Snyder will be endorsing the former Massachusetts governor, who is the early favorite in the Michigan Republican primary but may face a tough race against former Pennsylvania senator Rick Santorum. Snyder is in his first term. He won an open seat race in a landslide in 2010 but has encountered some tough early sledding, and his approval rating has suffered some because of it.