Barr made it quite clear that he was not opposed to looking into Clinton or a particular deal that is often cited by her critics as an example of corruption.
William Barr, the man multiple sources say President Donald Trump has told advisers he intends to nominate as his next attorney general, is no stranger to the job.
In the early 1990s, as attorney general, Barr supervised Robert Mueller in his work as the chief prosecutor for the Department of Justice criminal division. Barr is now an attorney for Kirkland and Ellis, a high-profile Washington, D.C., law firm.
Barr has been on a White House short list of contenders for several weeks, said a person with knowledge of internal discussions who was not authorized to speak publicly. When nominating Barr to serve as attorney general in 1991, Bush hailed the lawyer as "a man that I respect enormously".
By replacing Jeff Sessions, who was sacked by Mr Trump last month, the 68-year-old will take charge of the investigation into alleged Russian meddling in the 2016 USA election.
Barr served in the Bush administration from 1989 to 1993, starting out as an assistant attorney general in charge of the Office of Legal Counsel before becoming the deputy attorney general in 1990.
Barr also wrote an op-ed for the Washington Post a year ago defending Trump's controversial decision to fire former attorney general James Comey. "Those are the best attorneys general", said Democratic Sen.
Mr Barr has voiced disapproval over some aspects of the inquiry but his views on the investigation's legitimacy remain unknown. In 1977 he received his law degree from George Washington University before working in the Reagan administration as a member of the White House Domestic Policy department.
Barr also at one point took issue with the political affiliations of those on Mueller's team, telling the Washington Post in July of 2017 that "prosecutors who make political contributions are identifying fairly strongly with a political party".
Barr, a Columbia University graduate, worked at the Central Intelligence Agency while attending the George Washington University Law School at night.