I'll say this much for Mitt: He's a good and decent man. Nothing wrong with that. And he hasn't said "Macaca" yet!
No, but he got into a lot of trouble recently for using the expression "tar baby" (I think about the Big Dig), in spite of the fact that lots of other people, including a Boston Globe editorialist, had used it in the past few months. From Mitt's mouth, of course, it means he's racist.