The Justice Department lifted a gag order that will allow a former FBI informant speak to congressional panels investigating an Obama-era deal in which a Russian-backed company was able to get control of a significant amount of the United States uranium supply.

A DOJ spokesman late Wednesday cleared the way for the informant to disclose to the committees “any information or documents he has concerning alleged corruption or bribery involving transactions in the uranium market, including but not limited to anything related to Vadim Mikerin, Rosatom, Tenex, Uranium One, or the Clinton Foundation.”

GOP lawmakers launched probes this week into the 2010 deal, which was struck when Hillary Clinton served as former President Barack Obama’s secretary of state, but said a key informant couldn’t testify because of a confidentiality agreement with the DOJ.

T​he man, who hasn’t been identified by name, went undercover for the FBI for five years to ​get information on Russia’s efforts to gain a share of the US atomic energy market.

​Congressional investigators want to know more about how Russian energy giant Rosatom acquired Canadian mining company Uranium One, which has a mine in Wyoming, and then was able to get control of 20 percent of America’s uranium stockpile.

T​he Committee on Foreign Investment in the United States, which is composed of officials from several government agencies​ including the State Department that was headed at the time by Clinton, signed off on the deal.

News reports in 2015 revealed that former President Bill Clinton was paid $500,000 from a Kremlin-linked bank for a 2010 speech and the Clinton Foundation received millions in charitable donations around the time of the Uranium One deal.​

As it was being reviewed, the FBI was investigating bribery and kickbacks involving Tenex, a subsidiary of Rosatom, The Hill reported this week.

Tenex CEO Vadim Mikerin pleaded guilty to money laundering charges in 2015.

President Trump called the ​Uranium One deal​ Obama’s Watergate.

“The uranium sale to Russia and the way it was done was so underhanded. With tremendous amounts of money being passed, I actually think that’s Watergate: modern age,” he told reporters Wednesday.