WASHINGTON (Reuters) – The president’s oldest son, Donald Trump Jr., has added a lawyer with congressional experience to his legal team, ABC News reported on Sunday.

Trump Jr. has hired Karina Lynch of the law firm Williams and Jensen, ABC said. ABC said Lynch confirmed to the network that she had been hired by the president’s son, but she did not respond to a query from Reuters.

Trump Jr. also hired Alan Futerfas as a lawyer after reports that detailed meetings last year between him and a Russian lawyer.

A federal special counsel and several congressional panels are investigating allegations by U.S. intelligence agencies that Russia meddled in the 2016 U.S. presidential election and potential connections between Russian officials and the Trump campaign.

Moscow has denied any interference, and Trump says his campaign did not collude with Russia.

Trump Jr., his father’s former campaign manager Paul Manafort, and Jared Kushner, the president’s son-in-law and one of his senior advisers, all met with Russian lawyer Natalia Veselnitskaya in June 2016. That meeting was held in Trump Tower in New York after the lawyer offered damaging information about Democratic presidential candidate Hillary Clinton.

Lynch’s biography on her law firm website describes her as having experience on the Senate Permanent Subcommittee on Investigations. She was also investigative counsel to Senator Charles Grassley, according to her law firm biography.

The Senate Judiciary Committee said on Friday that Trump Jr. and Manafort had agreed to negotiate whether to be interviewed by the panel in its Russia investigation.