Donald Trump signed a loyalty pledge to the Republican Party pledge last fall, saying that he would forego a third-party run and support the party's eventual nominee in a highly-staged press conference.
"I see no circumstances under which I would tear up that pledge," Trump told reporters in New York in September.
Five months later, with a New Hampshire primary win under his belt, apparently things have changed.
During a campaign swing in South Carolina on Monday, Trump said that the RNC was "in default of that pledge," stoking speculation that he could still mount a third-party bid.
"I signed a pledge, but it's a double-edged pledge," Trump said Monday. "As far as I'm concerned, they're in default of that pledge."
WATCH: @realDonaldTrump says RNC "in default of their pledge" https://t.co/PCbawDYXQWhttps://t.co/PQ1O0x7lvL— ABC News Politics (@ABCPolitics) February 15, 2016
The "default" Trump was referencing ties back to Saturday's Republican debate in Greenville, South Carolina, in which Trump was repeatedly booed by the audience.
"The whole room was made of special interests and donors, which is a disgrace from the RNC," Trump said. "The RNC better get its act together because, you know, I signed a pledge. The pledge isn’t being honored by the RNC."
Chad Groover, the chairman of the Greenville County Republican Party, said he gave tickets to supporters, elected officials and those who "work hard for the party."
"You'll have a good mix of people who are donors, people who are donors and workers, and people who are just workers," Groover told WYFF-TV in Greenville.
On the day following the debate, Trump argued that debate tickets should be given to "the general public" instead of "lobbyists & special interests."
Tickets for future debates should be put out to the general public instead of being given to the lobbyists & special interests - the bosses!— Donald J. Trump (@realDonaldTrump) February 14, 2016
Were Trump to abandon his bid and mount a third-party presidential run, it could upend the already-tumultuous race for the White House. Michael Bloomberg, the former New York mayor and billionaire, is also considering a run at the White House.