Republican primary front-runner Donald TrumpDonald TrumpTrump announces new social media network called 'TRUTH Social' Virginia State Police investigating death threat against McAuliffe Meadows hires former deputy AG to represent him in Jan. 6 probe: report MORE on Sunday said he’s “not sure” whether primary rival Marco RubioMarco Antonio RubioHouse passes bills to secure telecommunications infrastructure Senators call for answers from US firm over reported use of forced Uyghur labor in China Republicans would need a promotion to be 'paper tigers' MORE can run for president.

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Trump on Saturday retweeted a follower who said the Florida senator, who was born in Florida to Cuban parents, is not eligible to run for higher office.

“I think the lawyers have to determine it,” Trump said on ABC’s “This Week,” when asked if he believed the tweet. “It was a retweet. Not so much with Marco, I’m not really that familiar with Marco’s circumstance.”

When pressed on why he retweeted the claim if he wasn’t sure about it, Trump said he was trying to “start dialogue” about the issue.

“Uh, because I’m not sure,” he said. “I mean, let people make their own determination.”

“Somebody said he’s not, and I retweeted it,” he added. “I have 14 million people between Twitter and Facebook and Instagram, and I retweet things and we start dialogue and it’s very interesting.”

Trump has also questioned the eligibility of primary rival Ted CruzRafael (Ted) Edward CruzOvernight Health Care — Presented by Carequest — Colin Powell's death highlights risks for immunocompromised The Senate confirmation process is broken — Senate Democrats can fix it Australian politician on Cruz, vaccines: 'We don't need your lectures, thanks mate' MORE, who was born in Canada to an American mother.