Chris Christie and the GOP Caucus

Chris Christie is the first candidate to go after Donald Trump by name in complete sentences, says CNN's John Berman. "I feel like too many, enough of us were burned with the Trump can't win stuff that there should be a moratorium on that," he adds. Miller: If you're running as a Republican for the presidential nomination, you're challenging Donald Trump. But just the fact that people are challenging Trump, which is what they're doing, doesn't do any harm."