The unidentified man placed a bet of $20,000 at $3.75 on the odds of Mr Trump being returned to office, and then followed it up with $100,000 at $3.40.
Betting company Sportsbet, who confirmed the bet had been made, is offering $3 on the odds of Mr Trump serving a second term.
It comes after a porn publisher Larry Flynt took out ads in The Washington Post offering $10 million for information that would lead to Mr Trump being removed from office.
The ad states: "The attempt to impeach Donald Trump will strike many as a sour-grapes plot by Democrats to overturn a legitimate election.
"But there is a strong case to be made that the last election was illegitimate in many ways - and that after nine tumultuous months in office, Trump has proven he's dangerously unfit to exercise the extreme power accrued by our new 'unitary executive'.
استمعوا هنا الى البث المباشر لاذاعتنا و لاذاعة BBC أيضا
