The spokesperson said Gowdy "has been terminated and is no longer a contributor" to Fox, where the South Carolina Republican had appeared just days before to discuss the ongoing impeachment inquiry in the House.
His addition to Trump's legal team comes as the president prepares for an impeachment battle over his pressure on Ukraine to investigate former Vice President Joe Biden, who is seeking to unseat the president in the 2020 election.
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The White House did not respond for comment about tapping Gowdy and Newsweek did not receive a response from the former congressman. His legal skills and his advocacy will serve the President well.
An administration official who spoke to the Associated Press on condition of anonymity confirmed Gowdy's hiring Tuesday.
Mr Gowdy was hired as a contributor to Fox News in January.
As chairman of what was then called the U.S. House Oversight and Government Reform Committee, Gowdy was loathe to hold public hearings when he could convene private member briefings instead, arguing these venues were more productive than allowing lawmakers to grandstand in front of the cameras. Gowdy also contradicted Trump a year ago, saying there's no evidence that the Federal Bureau of Investigation planted a "spy" in Trump's 2016 campaign, as Trump repeatedly claimed.
"The notion that you can withhold information and documents from Congress, no matter whether you're the party in power or not in power is wrong!"
His administration recently sent a letter House Democrats refusing to cooperate with the Impeachment probe. "Respect for the rule of law must mean something, irrespective of the vicissitudes of political cycles", Gowdy said, according to a Voice of America article quoted by Bloomberg. "Trey's command of the law is well known and his service on Capitol Hill will be a great asset as a member of our team", Sekulow said in a statement. Gowdy said this was an intentional choice to create a wall between the White House and Congress, which was supposed to be investigating potential misconduct within the administration. "The president has added a well-respected person, and the American people will appreciate and benefit from his integrity and competence".