The exchange got heated between Texas Senator Ted Cruz  and billionaire businessman Donald Trump in the Fox Business Channel debate. Asked if he truly was a “natural born citizen” of the United States, Cruz pointed out how, by some conspiracies on the issue, even Trump would be disqualified to be elected president because his mother was born in Scotland.

Trump responded, “I was born here. Big difference.”

Cruz accused Trump of making this an issue because Cruz has been catching up to him in the polls. Citing Trump’s declaration that Cruz may be disqualified, he reminded the audience Trump was saying the opposite just in September, when Trump said he’d had his lawyers look at the issue. “Since September the Constitution hasn’t changed, but the poll numbers have,” Cruz said.

The crowd booed Trump several times during the exchange.

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