A source in contact with ABC News said that President Trump has been considering the move for months and has already approved the pardon.
President Donald Trump is expected to grant a pardon to Scooter Libby, who was the chief of staff to then-Vice President Dick Cheney, a White House official said. The White House has repeatedly said that no pardons are now on the table for people caught up in the Russian Federation investigation.
The affair dates back to July 2003 when the name of Central Intelligence Agency agent Valerie Plame, the wife of a diplomat who had accused the Bush administration of exaggerating the threat posed by Iraq, was leaked to the press.
Trump first used his pardon authority previous year to pardon the controversial former Arizona sheriff Joe Arpaio, who'd been convicted of criminal contempt related to his methods of going after undocumented immigrants.
President Donald Trump speaks during an event on tax policy in the Rose Garden of the White House, Thursday, April 12, 2018..
Trump has already signed off on the pardon for Libby, who was convicted of lying to the Federal Bureau of Investigation and obstruction of justice in 2007, according to ABC News.
In this January 26, 2016, file photo, then-Republican presidential candidate Donald Trump is joined by Joe Arpaio at a campaign event in Marshalltown, Iowa.
His sentence was commuted by former president George W Bush, who declined however to issue a pardon - reportedly sparking a rift between him and Cheney.
Many conservatives, including U.S. National Security Advisor John Bolton, have called for Libby's pardon.