Fergus Cullen, New Hampshire's former GOP chair, on Friday hit President Donald Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE over false voter fraud claims he said were the reason New Hampshire Sen. Kelly Ayotte Kelly Ann AyotteBottom line Bottom line Bottom Line MORE lost her seat in November.

"I will pay $1000 to 1st person proving even 1 outofstate person took bus from MA 2 any NH polling place last ElectionDay #mapoli #nhpolitics," Cullen tweeted Friday evening.

I will pay $1000 to 1st person proving even 1 outofstate person took bus from MA 2 any NH polling place last ElectionDay #mapoli #nhpolitics — Fergus Cullen (@FergusCullen) February 10, 2017

During a closed-door meeting with a group of senators from both parties on Thursday, Trump digressed from a planned discussion of Supreme Court nominee Neil Gorsuch to talk about the elections, arguing that he and Ayotte both should have won the vote in New Hampshire.

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According to Trump, Ayotte's reelection bid was foiled by “thousands” of people from Massachusetts illegally casting ballots in the Granite State, meeting participants told Politico.

One source said that the room fell silent after the remark.

There is no proof of Trump's claim, and late Friday a Bush-appointed Federal Elections Commission member called on the president to show evidence for his statements so the commission could investigate.