Donald Trump will continue to invest in his campaign, claiming he will spend $100 million of his own money by Election Day.

"I will have over $100 million in the campaign, and I'm prepared to go much more than that," he told CNN's Dana Bash outside his new Washington, D.C. hotel, though he did not divulge the exact figure.

"In the old days, you'd get credit: If you would spend less money and have victory, that would be a good thing. Today, they want you to spend money."

Trump also expressed confidence that he'll defeat Democratic nominee Hillary Clinton despite many polls showing him trailing the former secretary of state.

"We are going to have, I think, a tremendous victory," he said. "If I didn't think that, I wouldn't say it."

Trump has yet to put $60 million into his campaign, according to records reviewed by CNN, and his contributions "slowed considerably" after he won the Republican nomination. His contributions from Oct. 1 to 19 will be revealed on Thursday.

According to Western Journalism, Trump brought in the largest small-donor fundraising pack in the history of the Republican Party. From small individual contributions of $200 or less, the billionaire has raised $78.6 million, over $30 million more than former nominee Mitt Romney and $18 million more than John McCain.

The GOP nominee also denied that he was trying to gain free advertising for his hotel by holding his event there on Wednesday, saying he was simply taking a break from his busy campaign schedule.

"For you to ask me that question is actually very insulting because Hillary Clinton does one stop, and then she goes home and sleeps," he said. "I want to back my children."