He has personally — personally! — directed his army of campaign surrogates to step up their own public attacks on Judge Curiel. He’s even condemned federal judges who are Muslim on the disgusting theory that Trump's own bigotry compromises the judge’s neutrality. You just can’t make this stuff up.
Now, like all federal judges, Judge Curiel is bound by the federal code of judicial ethics not to respond to these attacks. Trump is picking on someone who is ethically bound not to defend himself — exactly what you would expect from a thin-skinned, racist bully.
These are the words that Republicans should have used a year ago to stop Trump. They chose not to (something about racist, thin-skinned glass houses and several metric tons of palm-sized rocks perfect for throwing) and the result is a huge target on the GOP presumptive nominee that Sen. Warren and other Democrats will be hitting on a regular basis for the next six months.
By the way, if you think this is a hell of an audition for Hillary's veep pick, you would not be the only one.