Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE said Monday that only a natural disaster could stop him from facing Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE in all three presidential debates.

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Asked Monday whether he planned to participated in all three outings, Trump told reporters on his plane, "As of this moment, yeah," according to a video of the interview tweeted out by an NBC producer.

Pressed on what could cause him to change his mind, Trump replied, "Hurricanes, natural disaster …” before trailing off.

"I expect to do all three," he said. "I look forward to the debates."

Trump also said he had no plans to conduct mock debate sessions in which somebody plays the role of Hillary Clinton.

Such sessions are typical in traditional presidential debate preparation, but Trump prefers instead to have looser, cheeseburger-fueled sessions with top aides and informal advisers such as former Fox News chief Roger Ailes.

Trump said Monday he thought he had an "obligation" to debate Clinton and said the presidential debates are an "important element of what we're doing."