Mark Cuban: I saw Trump relative rolling her eyes during debate
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Billionaire Mark Cuban says one of Donald TrumpDonald TrumpJudge rules Alaska governor unlawfully fired lawyer who criticized Trump Giuliani led fake electors plot: CNN Giuliani associate sentenced to a year in prison in campaign finance case MORE’s family members rolled her eyes at the GOP nominee during the first presidential debate.

“There was a point when [Trump] said something, and this family member just rolled their eyes, and she saw I had seen it,” he said at the Advertising Week New York conference in New York City Thursday, according to Page Six.

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Cuban, who supports Democratic nominee Hillary ClintonHillary Diane Rodham ClintonNo Hillary — the 'Third Way' is the wrong way The dangerous erosion of Democratic Party foundations The Hill's Morning Report - Presented by Facebook - Democrats see victory in a voting rights defeat MORE, refused to identify the Trump relative.

“[I] don’t want to bust them,” he said.

Cuban also noted that Clinton and her family stayed to mingle with supporters after the contest, while the Trumps quickly departed.

“[It was] exit stage left immediately,” the owner of the NBA’s Dallas Mavericks said.

Cuban last week said he had accepted an invitation from Clinton’s campaign to watch her “overwhelm” Trump from a front-row seat.

Trump countered by threatening to invite Gennifer Flowers, who had an extramarital affair with Clinton’s husband, former President Bill ClintonWilliam (Bill) Jefferson ClintonPerdue proposes election police force in Georgia To boost economy and midterm outlook, Democrats must pass clean energy bill Could the coming 'red wave' election become a 'red tsunami'? MORE. Flowers did not attend the debate.

Cuban ultimately clarified he did not have a front-row seat.

Hillary Clinton on Thursday, though, said Cuban’s presence at the debate still rattled Trump.

“At the debate the other night, one of my well-known supporters, Mark Cuban, was there in the front row, and he really, I think, unsettled my opponent,” she said at a rally in Des Moines, Iowa.

Polls released after Monday’s debate show Clinton with a modest bump both nationally and in swing states.

Clinton leads Trump by about 3 percent nationally, according to the latest RealClearPolitics average of polls.