He later commented on the 2005 tape of Trump and then "Access Hollywood" host Billy Bush saying, "He's never used the P-word in front of me, I'll say that."
Trump's aggressively sexual comments have caused his campaign to lose several key Republican supporters.
See more of the legendary reporter:
Geraldo Rivera through the years
Geraldo Rivera through the years
Participant Geraldo Rivera speaks about the NBC television show "The Celebrity Apprentice" during the TCA presentations in Pasadena, California, January 16, 2015. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENTERTAINMENT MEDIA)
Television journalist Geraldo Rivera (L) is escorted away after being denied entry to the funeral of slain New York Police Department officer Wenjian Liu in the Brooklyn borough of New York January 4, 2015. New York Mayor Bill de Blasio appealed for reconciliation on Sunday in his eulogy for the second of two police officers murdered last month in an ambush that led to accusations the mayor had contributed to an anti-police climate. Liu, 32, and Ramos, 40, were ambushed on December 20 by a killer who said he wanted to avenge the deaths of two unarmed black men this summer at the hands of white officers. REUTERS/Carlo Allegri (UNITED STATES - Tags: CRIME LAW OBITUARY MEDIA)
SOUTHAMPTON, NY - JULY 23: Geraldo Rivera attends Ellen Hermanson Foundation Starry Night Gala on July 23, 2016 in Southampton, New York. (Photo by Jared Siskin/Patrick McMullan via Getty Images)
GOOD MORNING AMERICA - Geraldo Rivera and Edyta Sliwinska are guests on 'Good Morning America,' 3/29/16, airing on the ABC Television Network.
(Photo by Fred Lee/ABC via Getty Images)
NEW YORK, NY - JANUARY 30: (EXCLUSIVE COVERAGE) Geraldo Rivera poses backstage at the matinee of Andrew Lloyd Webber hit musical 'School of Rock' on Broadway at The Winter Garden Theatre on January 30, 2016 in New York City. (Photo by Bruce Glikas/FilmMagic)
Geraldo Rivera attends the 'Cantor Fitzgerald Charity Day' at Cantor Fitzgerald midtown in New York City. ï¿½ï¿½ LAN (Photo by Lars Niki/Corbis via Getty Images)
NEW YORK, NY - MARCH 12: Geraldo Rivera attends the 2015 Love Heals Gala at the Four Seasons Restaurant on March 12, 2015 in New York City. (Photo by Mark Sagliocco/FilmMagic)
NEW YORK, NY - AUGUST 13: TV host Geraldo Rivera is photographed for 25A Magazine on August 13, 2015 in New York City. PUBLISHED IMAGE. (Photo by Andrew H. Walker/Getty Images Portrait)
PASADENA, CA - JANUARY 16: TV personality/journalist Geraldo Rivera attends the NBCUniversal 2015 Press Tour at the Langham Huntington Hotel on January 16, 2015 in Pasadena, California.(Photo by Jeffrey Mayer/WireImage)
NEW YORK, NY - JANUARY 30: Erica Rivera and Geraldo Rivera attends Erica Rivera's 40th Birthday hosted by Geraldo Rivera at Monkey Bar on January 30, 2015 in New York City. (Photo by Craig Barritt/Getty Images for Geraldo Rivera)
PASADENA, CA - JANUARY 16: Geraldo Rivera attends the NBCUniversal 2015 press tour at The Langham Huntington Hotel and Spa on January 16, 2015 in Pasadena, California. (Photo by Jason LaVeris/FilmMagic)
PASADENA, CA - JANUARY 16: TV host Geraldo Rivera of 'The Celebrity Apprentice' poses for a portrait during the NBCUniversal TCA Press Tour at The Langham Huntington, Pasadena on January 16, 2015 in Pasadena, California. (Photo by: Christopher Polk/NBC/NBCU Photo Bank via Getty Images) NUP_166973_1933.JPG