Donald Trump's racist comments are a diversionary tactic

On Thursday, Hillary Clinton gave a powerful speech about the grave dangers a Donald Trump presidency could pose, such as global economic crisis and nuclear war.

Later on Thursday, Trump made an appallingly bigoted comment, saying that the judge presiding over the Trump University fraud trial - reminder: Donald Trump is a defendant in the fraud trial - could not be impartial because he is of "Mexican heritage" and a member of a Latino lawyers' association.

I do not believe this timing was a coincidence, or an unforced error on Trump's part. I believe it was a deliberate tactic designed to change the subject - one that could work.

Trump would rather have a national conversation about whether he is a bigot than one about whether he is too erratic to be trusted with the nuclear codes. That's because he'd rather argue about whether he's bad for some people than about whether he's bad for everyone