There is a case to be made:

Republican Mitt Romney, whose father served as governor of Michigan from 1963-1969, would help John McCain beat Barack Obama in the presidential election in that state, according to this latest SurveyUSA poll looking at Vice Presidential pairings. When Michigan registered voters are asked if they would vote for McCain or Obama, with no running mates mentioned, McCain leads Obama by 4 points, just within the survey's 4.3 percentage point margin of sampling error. When Mitt Romney is added into the mix as McCain's running mate, McCain performs better against nine possible Obama tickets, and worse against just one. John Edwards is the one Democrat who helps Obama, who still loses by 3 points to a McCain/Romney ticket -- again within the survey's margin of sampling error.