TROY, Mich. — Hours after his biggest opponent won Donald Trump’s endorsement, Republican gubernatorial candidate Kevin Rinke emerged Saturday morning at his campaign event undeterred, saying the former president’s support doesn’t guarantee a win. Rinke, standing outside his campaign headquarters in Oakland County where about 75 supporters rallied for him, said most Michigan voters have already made up their minds about their candidate and he doubts Trump’s endorsement will swing anyone at this point. “The president has lost people across the country where he has endorsed. His candidates — he …