In this 2005 frame from video, Donald Trump prepares for an appearance on “Days of Our Lives” with actress Arianne Zucker. He is accompanied to the set by “Access Hollywood” host Billy Bush. (Obtained by The Washington Post)

NBC News was aware of video footage of Donald Trump making lewd and disparaging remarks about women for nearly four days, a network executive said Saturday, but held onto the recording until lawyers finished reviewing the material.

The network’s caution led to an awkward result: NBC News was scooped by The Washington Post, which took just five hours to vet and post its story. A tip from an individual led to The Post breaking one of the most consequential stories of the 2016 presidential campaign.

[Trump recorded having extremely lewd conversation about women in 2005]

The disclosure of Trump’s unguarded comments, which were made while he was wearing a microphone for an interview on “Access Hollywood” in 2005, has led to calls for him to step down as the Republican nominee. Trump, who squares off against Hillary Clinton on Sunday in the second presidential debate, has vowed to remain in the race.

NBC News first became aware of the footage late Monday after receiving notice from producers at “Access Hollywood,” a syndicated entertainment-news program owned by NBC. The program’s producers had combed their archives for interviews with Trump after reading an Associated Press account of crude remarks he had made about female contestants on “The Apprentice,” the NBC reality program that Trump had starred on for 14 seasons.

In this video from 2005, Donald Trump prepares for an appearance on “Days of Our Lives” with actress Arianne Zucker. He is accompanied to the set by "Access Hollywood” host Billy Bush. The Post has edited this video for length. (Obtained by The Washington Post)

They found the 2005 segment, in which Trump and “Access Hollywood” co-host Billy Bush banter crudely about women while traveling to a studio taping.

[Crisis grips GOP as more Republicans urge Trump to quit]

By Tuesday morning, NBC News determined that the footage was newsworthy and began to prepare a story. The news division agreed to let “Access Hollywood” break the story first, given that it had shot and unearthed the tape, according to an NBC executive who agreed to give the network’s account on condition he not be named or quoted directly.

But the tape languished, unseen by the public, for several days after it first came to light.

Although NBC and “Access” both recognized the newsworthiness of the tape and intended to air it, it first had to undergo a review by the company’s lawyers, the executive said. The executive was unaware of any specific legal issue raised by airing an 11-year-old recording of a presidential candidate who was apparently aware at the time that he was being recorded by a TV program.

News outlets often submit potentially sensitive stories to lawyers for review before publication or broadcast.

Trump has used the threat of lawsuits in the past. The Republican nominee threatened to sue NBC last year after the network’s entertainment division dropped plans to air the Miss USA beauty pageant in the wake of Trump’s inflammatory remarks about Mexican immigrants. Trump backed off those threats when NBC sold its share of the pageant’s rights to him in September 2015.

1 of 28 Full Screen Autoplay Close Skip Ad × These Republicans cut ties with Trump after lewd remarks View Photos Following a Friday report by The Washington Post on a 2005 video of the GOP presidential nominee, various Republicans have said they no longer plan to vote for him and some call for him to drop out. Caption Following a Friday report by The Washington Post on a 2005 video of the GOP presidential nominee, various Republicans have said they no longer plan to vote for him and some call for him to drop out. Sen. John McCain Sen. John McCain (R-Ariz.) joined the cavalcade of Republicans withdrawing their support for Trump. “There are no excuses for Donald Trump’s offensive and demeaning comments in the just released video; no woman should ever be victimized by this kind of inappropriate behavior. He alone bears the burden of his conduct and alone should suffer the consequences,” McCain said in a statement. Susan Walsh/AP Buy Photo Wait 1 second to continue.

[More Trump tapes surface with crude sex remarks]

Although the news division had nearly completed its work on the story by Friday morning, the story was still not scheduled to air by then. “Access Hollywood,” a daily program, had also not established an air date for its piece.

At that point, a still-anonymous individual forced the issue. The individual called Washington Post reporter David Fahrenthold around 11 a.m. Friday and pointed him to a copy of the tape on which Trump brags to Bush that his celebrity status entitles him to grope women.

The Post reported and posted its story within five hours. NBC News, tipped that The Post story was imminent, finally decided to go with the story it had been holding all week. It waited until The Post’s account was online and aired its story on MSNBC seven minutes later. “Access Hollywood” broadcast a piece later that evening.

The network executive said he does not know who The Post’s source was, but noted that numerous people had access to the footage throughout the week, including employees of “Access Hollywood,” NBC News and NBC’s corporate staff.

He also would not speculate over the individual’s motives.

There are no plans, he said, to investigate the source of the leak within NBC’s news division.