President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE's outside legal team has hired another lawyer as it responds to growing legal issues surrounding reports that the president's personal attorney paid an adult-film star to keep quiet about an alleged affair between the two.

Lawrence Rosen, a New York attorney described as a "pit bull" on his firm's website, will join Trump's longtime personal attorney, Michael Cohen, to handle the issue, three people close to the situation told ABC News.

Adult-film actress Stormy Daniels, who claims she had an extramarital affair with Trump in 2006, filed a lawsuit against the president this week to void a nondisclosure agreement between the two.

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Cohen reportedly wired Daniels's attorney $130,000 in October 2016, a month before the presidential election, as part of a "hush money" agreement.

Her attorney, Michael Avenatti, said that Trump never signed the documents, and therefore his client could not be kept quiet about the alleged affair.

White House press secretary Sarah Sanders said Wednesday that to the best of her knowledge the president was not aware of the payment, a claim that Avenatti said was "patently absurd." Sanders referred further questions back to the president's outside counsel.