Presidential front-runner Donald TrumpDonald TrumpConway says she'll talk to Trump about press safety Helen Mirren gives advice for being a ‘nasty woman’ Gingrich goes off on Megyn Kelly over Trump allegations: 'You are fascinated with sex' MORE is attacking Ted CruzTed CruzThe Trail 2016: An important lesson in geography Webb: The race to 270 Potential Cruz challenger: 'Don't close off your options' MORE for being born in Canada, predicting it could become an issue for his Republican rival.
“Republicans are going to have to ask themselves the question: ‘Do we want a candidate who could be tied up in court for two years?’ That’d be a big problem,” Trump told The Washington Post before a rally in Massachusetts on Tuesday night.
“It’d be a very precarious one for Republicans because he’d be running and the courts may take a long time to make decision. You don’t want to be running and have that kind of thing over your head," Trump continued in the interview.
A Cruz aide declined to comment to the Post for its report Tuesday, though Cruz's Twitter account tweeted
a link to a clip from "Happy Days" suggesting Trump's claim had gotten stale.
The Constitution stipulates that to be eligible for the presidency one must be a "natural born citizen," long regarded as including anyone born to a U.S. citizen regardless of where the birth took place.
Cruz, who was born in Canada to an American mother and Cuban father, had dual citizenship before renouncing
his Canadian citizenship after becoming a senator.
Trump has brought the "birther" charge against Cruz before. In March 2015, before launching his own campaign but after Cruz announced his, Trump said Cruz's Canadian birthplace was "a hurdle."
"I’d hate to see something like that get in his way. But a lot of people are talking about it, and I know that even some states are looking at it very strongly, the fact that he was born in Canada and he has had a double passport," Trump told the Post on Tuesday.
Cruz is the favorite to win the Iowa caucuses early next month and is in the top tier of candidates trying to upset Trump in other early-voting states.