Mitt Romney actually said...

I simply can't put my name down as someone who voted for principles that suggest racism or xenophobia, misogyny, bigotry, who has been vulga...

I think he has calculated he could get support even if he shot someone, but if he released his taxes, he would lose support.

I wish there had been somebody that stopped Mr. Trump, had I been in the race, I can assure you, I would have taken him on.

There's no question in my mind, he will never release his tax returns.