The 12 Republicans on the committee voted for Barr, while all 10 Democrats opposed.
Barr said he also "weighed in repeatedly" to "complain" about the DOJ prosecuting Democratic. Sen.
In part, they say Barr left open possible loopholes in his commitment to airing Mueller's findings and a broad view of presidential power that might allow Trump to interfere in Mueller and other investigations into his campaign, family or associates.
Multiple legal and constitutional scholars have argued that Whitaker's appointment to acting attorney general was unconstitutional because he was not confirmed to the position by the US Senate. His confirmation is expected to draw a bitter partisan fight, especially given how Barr would oversee the special counsel investigation.
During his confirmation hearing earlier this year, Barr, 68, assured senators of his independence and said that he would not be bullied by anyone into doing something he believes is wrong if he becomes the attorney general.
The Judiciary Committee late last week postponed its vote on advancing Barr's nomination amid concerns from Democrats - which is customary for high-profile nominations.
But Durbin said Barr has "telegraphed his pitch" by writing an unsolicited memo to Justice Department and Trump lawyers a year ago about parts of the special counsel probe. In the memo, Barr wrote that Trump could not have obstructed justice by firing former FBI Director James Comey since it was an act the president was constitutionally entitled to take. Amy Klobuchar, D-Minn., said.
If he wins the job, Barr's independence could be put to the test when Mueller wraps up his investigation into the Trump campaign's possible ties to Russian Federation during the 2016 election. Trump calls the probe a "witch hunt".
Barr pledged at his confirmation hearing to keep politics out of Justice Department decisions and said he would refuse an instruction from the president to fire Mueller absent good cause to do so.