Trump tells a crowd of thousands in Las Vegas, “This guy is sick. There’s something wrong with this guy.”

Trump took specific issue with an ad Cruz’s campaign has been airing that accuses Trump of being against turning over federal land in Nevada to state control.

But Trump says it’s “not a subject I know anything about.”

“Something to do with I want to take away your land? And I want to keep it in the federal government? I don’t even know what the hell they’re talking about,” Trump said.

Trump is not only ready to battle rival candidates. At a another Las Vegas event he said he’d like to punch a protester in the face and bemoaned the “old days” when he said the man would have been taken out of the event on a stretcher.

Trump made the comments as security was escorting the protester from a Las Vegas arena, filled with thousands of Trump supporters on the eve of the Nevada caucuses.

The guards were being “very gentle,” Trump says, allowing the man to be walk out of the arena smiling.

Trump began: “You know what I hate? There’s a guy totally disruptive, throwing punches. We’re not allowed to punch back anymore.”

Reporters didn’t see why the man was ejected, and it was unclear whether he had actually thrown any punches.

Still, Trump went on: “I love the old days. You know what they used to do to guys like that when they were in a place like this? They’d be carried out in a stretcher, folks.”

The crowd thundered in agreement.

“I’d like to punch him in the face,” Trump added.