Barr was unashamedly protecting Trump from any potentially negative perceptions he might have earned due to his flagrantly unlawful activity and obstruction of justice. Barr refused to concede some obvious failures on his part to be an objective servant of the American people, rather than a personal criminal lawyer for Trump.
Even so, Barr couldn’t remember whether or not Trump ever asked him to open an investigation into Trump’s political opponents or critics. He admitted that he didn’t review the evidence in the Mueller report before deciding that Trump was innocent. He denied that directing someone to change their testimony (as Trump did to White House Counsel Don McGahn) was witness tampering and obstruction of justice. He defended his use of the loaded, Trumpian term of “spying” during his previous congressional testimony. He couldn’t even say whether the President’s actions were consistent with his oath of office. So Barr is not just another Trump lawyer, he’s as bad at it as the rest of Trump’s legal team.