Ty Cobb, a longtime Hogan Lovells partner based in Washington, D.C., has joined President Donald Trump's personal white-collar defense team, Bloomberg News reported Friday.

The hiring hasn't been officially announced yet, and several leaders and a spokesman for Hogan Lovells did not immediately respond to requests for comment. Cobb's email was set to an out-of-office auto reply Friday, saying he's "currently on travel."

The Bloomberg story said Cobb would serve as "traffic cop, enforcer of discipline and public spokesman" for the Trump legal team as it grapples with simultaneous congressional and Justice Department investigations into the Trump campaign s Russia contacts, which are consuming the president's politics more every day.

Cobb will also work with outside lawyers representing others in Trump's inner circle, the report said.

The other members of the president's legal team include Marc Kasowitz, who this week was under fire after Pro Publica Inc. raised questions about his comportment; Jay Sekulow, who has primarily acted as a spokesperson for the president's case; and John Dowd, the combative Washington, D.C., criminal defense lawyer who retired from Akin Gump Strauss Hauer & Feld in 2015.

Cobb has worked on white-collar cases for more than three decades. He previously was on Hogan Lovells executive committee and ran various practices including white-collar criminal litigation, U.S. Securities and Exchange Commission enforcement and congressional investigations and hearings. Past clients include IBM, members of the Saudi royal family, a private oil company in Argentina, the insurance company American International Group Inc. and former Democratic National Committee fundraiser John Huang, who ultimately pled guilty in a felony campaign finance scandal.

Meanwhile, some of Cobb's colleagues at Hogan Lovells are entrenched in one of the most significant challenges to Trump's executive authority: litigation on behalf of the state of Hawaii over the president's March 6 executive order banning immigrants from six majority-Muslim countries. The firm has been public about its involvement in the case, publishing updates in the case on its website.

Partner Neal Katyal, the former acting U.S. solicitor general, has been an especially prolific and high-profile critic of Trump's administration.

Just Wednesday, U.S. District Judge Derrick Watson of the District of Hawaii ordered the government to expand the group of individuals exempt from the ban, in accordance with a June U.S. Supreme Court ruling, to include grandparents, grandchildren, aunts and uncles and cousins of those in the United States.

On Thursday, Katyal tweeted that the ruling was "possible because of the amazing work of" Hogan Lovells, among others.