How do GOP candidates fare when they encounter birther nonsense?
His angry tweet came shortly after Fox News canceled an upcoming appearance.
The business mogul wants to shut down an anti-Trump clothing store for trademark infringement.
"You let that pass," the CBS anchor told Trump. "And I wonder what that tells us about you."
Colbert pretending to be crazy, or Trump pretending to be sane?
"It'll be ... not a penetrable wall. This will be a serious wall."