Hope Hicks, once a top Trump aide, tells court Access Hollywood tape rattled the campaign

Hope Hicks, a former top aide to Donald Trump, testified on Friday that he told her in the final days of the 2016 presidential election to deny that he had a sexual relationship with porn star Stormy Daniels.

Hicks's testimony gave jurors an inside look at the campaign's damage-control efforts when Trump faced multiple accusations of inappropriate behaviour in the waning weeks of his successful White House campaign.

Trump has pleaded not guilty to charges of falsifying business records to cover up a $130,000 payment made at that time to Daniels, who was threatening to go public with her story of their 2006 sexual encounter.

Hicks, who was Trump's press secretary during the campaign, testified that she told Trump four days before the Nov. 8, 2016, election that the Wall Street Journal would publish details of Daniels's story.

"He wanted to make sure that there was a denial of any kind of relationship," said Hicks.

Prosecutors in the first criminal trial of a former U.S. president argue that the payment to Daniels corrupted the election by suppressing news that could have influenced voters as they decided whether to back the Republican Trump or his then-Democratic rival, Hillary Clinton.

Prosecutors say Trump falsified records to cover up election-law and tax-law violations, which elevates the 34 counts he faces from a misdemeanor to a felony punishable by up to four years in prison.

Trump, the Republican candidate for president again this year, sat expressionless at the defendant's table during the testimony by Hicks, the first person who worked for Trump's campaign to appear as a witness in the 11-day-old trial.

Hicks, who had been working for Trump's business, told jurors she was surprised by his entry into politics in 2015 and thought he was joking when he asked her to be the campaign press secretary.

"I wasn't sure if I should take it seriously," she said.

Hicks said the campaign was rattled in October 2016 by the public release of an audio recording from the Access Hollywood TV show in which Trump bragged about grabbing a woman's genitals.

She said Trump was upset but also played down the comments.

"Mr. Trump felt like this wasn't good, but it was also just like two guys talking, locker-room talk," she testified.

Hicks told the court when the Wall Street Journal asked whether Trump had had an affair with former Playboy model Karen McDougal, she and Trump discussed contacting Rupert Murdoch, then chairman of the Journal's parent company, News Corp, to buy some time. Trump ultimately said he wanted to write his own statement, she said.