0710 GMT May 20, 2019
The Republican nominee, in a shocking video released by The Washington Post Friday, was caught using vulgar language about women with impunity.
"I've said and done things I regret," he said in a televised apology, believed to be the first of his 16-month White House campaign, AFP reported on Saturday.
"Anyone who knows me knows these words don't reflect who I am. I said it, I was wrong, and I apologize."
Trump was facing savage criticism after release of the video, which landed like a bombshell and gave his Democratic rival Hillary Clinton fresh ammunition to attack his misogyny as they prepared for their second presidential debate in St. Louis.
"I've never said I'm a perfect person, nor pretended to be someone I'm not," Trump said.
"I pledge to be a better man tomorrow."
Damage not controlled
But major damage was already done, with several fellow Republicans withdrawing their endorsements of Trump.
"I can no longer in good conscience endorse this person for president," Republican congressman Jason Chaffetz of Utah told Fox.
"It is some of the most abhorrent and offensive comments that you can possibly imagine."
In the video from 2005, obtained and released by The Washington Post, Trump uses extraordinarily vulgar and predatory language as he describes hitting on a married woman.
"When you're a star they let you do it. You can do anything," he is heard saying.
Trump finds himself mired in fresh scandal at a crucial point in the campaign with just one month until Election Day on November 8 and Clinton expanding her lead in national and battleground state polling.