What happens if Mitt Romney wins Michigan?  —  DETROIT — For the past week, much of the focus of the Republican presidential race has centered on the consequences Mitt Romney will face if he loses Michigan's primary.  After a debate in Arizona on Wednesday, the question should be: What will happen if he wins his home state?

Democrats: Is Rick Santorum for real?  —  Last week, the Obama campaign made what seemed, on its surface, like a startling announcement: They were steering some of their opposition researchers, who had been mostly trained on Mitt Romney, to a rocketing Rick Santorum.