It's as difficult to determine how much of that 10 point shift has to do with racism as it is to get any of them to admit it. The fact is that some white folks simply cannot get over the fact that a black man may someday be President and in all likelihood they were Rush Limbaugh dittoheads who saw Hillary's nomination as the best way to block Barack in the first place. (Rush made it fairly obvious that Hillary would provide a tempting target for the republican slime machine, to say nothing of what it would do to his show's ratings).