New York radio host Mark Simone and GOP presidential candidate Donald Trump questioned whether Sen. Ted Cruz (R-TX) is eligible to run for president because “he was born in Canada.”

Simone, a self-proclaimed longtime friend of Trump who recently said he “loves Donald Trump,” hosted the businessman on the April 12 edition of his WOR show. After saying Colorado’s “system is rigged” because Cruz received the state's entire set of delegates, Simone brought up a hearing by the New Jersey secretary of state to determine Cruz's eligibility to be president because of his birthplace. Trump said Cruz isn't eligible because “he was born in Canada” and you need to be “natural born” which “means on this land.” Listen:

MARK SIMONE (HOST): For the first time, [Cruz] is really being challenged in court, in New Jersey, by the secretary of state about whether he's technically legally eligible to be president. That could turn the whole thing.

DONALD TRUMP: I didn't even know that. Is that a fact?

SIMONE: Well, it was reported in the papers, because any secretary of state, that's the guy that --

TRUMP: Where did you read this? Is this today?

SIMONE: Yesterday.

TRUMP: Oh, where? I've got to get that.

SIMONE: I'm pretty sure it was in the Post. You can find it online.

TRUMP: Yeah, I'll check it. No he's not -- look, he was born in Canada. He lived in Canada for four years. He was a Canadian citizen 18 months ago.

SIMONE: Yeah, but the guy that would have standing to bring the case is the secretary of state who has to put him on the ballot. So apparently in New Jersey, it was reported, the secretary of state is going to bring that to court.

TRUMP: You know what? It’s a great case. I mean, it’s such a great case. That's really amazing. I didn't know that there was reporting on it. I know that he's got a big problem in a couple of states. Big, big problem. Look, he was born in Canada. You're supposed to be natural born. Natural born means on this land. Unless you're born on a military base or something like McCain, which I understand. I get that.

This isn't the first time Trump has questioned Cruz's eligibility. He responded to a question in January about whether Cruz was eligible to run by saying, “I don’t know. I really don’t know. It depends.” Later that month Trump floated the idea that he might sue Cruz over his citizenship, noting that others have tried but lacked standing, yet as a candidate, Trump has “standing to sue.” Trump revisited the possibility of a lawsuit in February after Cruz released attack ads against him.