Attorney General William Barr revealed Wednesday during his testimony to Congress that he is planning to double over the work in special counsel Robert Mueller’s investigation into alleged Russian collusion.

In addition, Barr told the Senate Judiciary Committee, he has members of the Department of Justice (DOJ) investigating the origins of the Russia probe, whether spying on members of the Trump campaign was justified and the use of the Steele dossier in the investigation.

“I do have people in the Department helping me review the activities over the summer of 2016,” Barr told Republican Sen. Chuck Grassley, referring to the activities of the FBI in opening the case against the Trump campaign.

WATCH:

“My question: Mueller spent over two years, $30 million investigating Russian interference in the election. In order for a full accounting of Russian interference attempts, shouldn’t the special counsel have considered on whether the Steele dossier was part of a Russian disinformation and interference campaign?”

Barr explained that he hasn’t had anyone go through the “full scope” of Mueller’s investigation and his findings on the Steele dossier, but indicated he intends to double over Mueller’s work and see “what the special counsel looked into.”

In addition to reviewing Mueller’s work, Barr also told Grassley that there are multiple criminal leak investigations underway in regard to media reports about the Russia investigation. (RELATED: Barr: DOJ Has ‘Multiple’ Criminal Leak Investigations Underway)

Follow Amber on Twitter