'This Is Strictly Politics': Arpaio Responds to Sanders Calling Him 'Bully'

Romney Rails Against 'Trumpism,' Says He's Backing Cruz at Utah Caucus

Today, Ted Cruz gave a press statement in Arizona, a sign that the Texas senator is trying to make a play in a state in which Donald Trump holds a double-digit lead.

Tonight on "Special Report," Charles Krauthammer said Cruz is the only who can challenge Trump in the Grand Canyon State.

"Look, the fight between the establishment and anti-establishment is over," he said. "The anti-establishment has won, in the form of Cruz and Trump."

He said that the question is now which one of those two the nominee will be, adding that it won't be Ohio Gov. John Kasich.

"The fact is we are down to two candidates. One is a populist, the other's a conservative. It's not a hard choice."

Krauthammer said that if the two candidate end up close to each other in delegates that either one would have a claim to legitimacy in the nomination.

"If it's a huge spread, well, that's a different story."

Watch the analysis above.

Report: Envelope With White Powder, Threatening Note Sent to Eric Trump

Trump and Cruz Troll Each Other With Jim Carrey Film References

Newt: If You're Not for Trump or Cruz, Then You're for Hillary