Mr. Barr said he “saw no reason to appoint a special advisor and I have no plan to do so before I leave.”

Donald Trump has been pushing particularly for a person to be appointed to investigate the president-elect’s son, Joe Biden.

Hunter Biden is currently undergoing a federal criminal investigation into his taxes. Mr. Bar said he believed the investigation was “being handled with responsibility and professionalism”.

The attorney general resigned last week and will step down on Wednesday.

He also said that he saw no reason for a special advisor to investigate the election results, did not see any basis for the federal government to confiscate the voting machines, and sided with Secretary of State Mike Pompeo on the president by saying that the massive hacking of government computers appeared to be the work of Russia.

Biden’s transition team said the president-elect is not discussing his son’s investigation with any potential candidates to serve as attorney general when his administration takes office in January.

Biden said he was “confident” his son Hunter had done nothing wrong. Republican senators were discussing starting their own investigation.

The president slammed the attorney general earlier this month, calling it a “major disappointment” over the Hunter Biden tax investigation.

Mr. Barr was aware of a federal investigation into the president-elect’s son for a year, but kept calm during the election, according to Wall Street Journal.

The outgoing president is angry that Mr. Barr has not politicized the investigation and allowed Trump to use it to his advantage.

“Why didn’t Bill Barr reveal the truth to the public, before the election, about Hunter Biden. Joe was lying on the debate stage that nothing was wrong or still going on – the press confirmed. A huge flaw for Republicans at the polls!”

The Biden transition team released a statement on December 9 in which Hunter Biden said he had learned from federal prosecutors that his tax affairs were under investigation by the Delaware attorney general’s office.