Alaska Senator Lisa Murkowski announced that she would not back President Donald Trump’s controversial Pentagon nominee, and Maine Senator Susan Collins has also voiced her disapproval.

A defining duo of the first Donald Trump administration is back.

The Senate narrowly advanced the nomination of Pete Hegseth as President Donald Trump’s defense secretary on Thursday in a 51-49 vote, moving him one step closer to confirmation despite fierce objections from Senate Democrats and mounting unease among some Republicans.

Donald Trump's pick for Defense Secretary, Pete Hegseth, is facing stiff criticism from Democrats—but most Republicans back him.

Two Republican senators publicly announced they would vote against the confirmation of Pete Hegseth, President Donald Trump’s cabinet pick for defense secretary.

Two Republican Senators, including Maine’s Susan Collins, voted against the confirmation of Pete Hegseth as President Donald Trump’s defense secretary.

Pete Hegseth has lost the support of two GOP senators ahead of a final confirmation vote.

Republicans are confident that Hegseth, who has been accused of alcohol and domestic abuse, will ultimately be confirmed to lead the Pentagon.

A Princeton and Harvard-educated former combat veteran, Hegseth went on to make a career at Fox News, where he hosted a weekend show. Trump tapped him as the defense secretary to lead an organization with nearly 2.1 million service members, about 780,000 civilians and a budget of $850 billion.

Collins was one of two Republican senators to break ranks and oppose Hegseth Thursday, but it didn't stop the nomination from moving forward.

Pete Hegseth is on track to be secretary of defense, despite Murkowski's opposition. He has denied multiple allegations of alcohol abuse, financial mismanagement and violence against women.