WASHINGTON, Feb. 13 (Xinhua) -- An ex-Republican leader in the northeastern U.S. state of New Hampshire is posting a reward of 1,000 U.S. dollars to any potential tipster who can first provide proof of voter fraud in the state in the 2016 presidential election.

Fergus Cullen, former chairman of the New Hampshire Republicans, tweeted that evidence of a single illegal vote, cast by any Massachusetts resident who boarded a bus to New Hampshire and voted illegally, will suffice.

"I will pay 1,000 dollars to 1st person proving even 1 out of state person took bus from MA 2 any NH polling place last ElectionDay #mapoli #nhpolitics," Cullen tweeted on Feb. 10. ' "Anyone claiming buses bring 100s from out-of-state to NH to vote has never tried to rent several buses," he tweeted. "Go ahead, call around."

Resonating to President Donald Trump's similar claim, Cullen said that illegal voters are the reason both he and outed Republican Senator Kelly Ayotte lost New Hampshire to their Democratic rivals in November.

Trump, though winning the electoral college handily, has repeatedly claimed that he lost popular votes to Democratic rival Hillary Clinton due to mass voter fraud. However, U.S. mainstream media argued that there is no evidence of widespread voter fraud anywhere in the country.

It has never once been documented, studies that suggest it could be happening have been discredited, and election officials in states where it has been alleged say such allegations are baloney, according to a report from the Boston magazine.

Cullen's proposal came days after Trump was reportedly riffed with senators about a conspiracy in Massachusetts to sabotage the election in the swing state.