The Republican chairman overseeing hearings on Senator Markwayne Mullin’s nomination to lead the Department of Homeland Security blasted the Oklahoma Republican for “anger issues,” arguing they disqualified him from leading an agency enmeshed in controversy over aggressive tactics.

If confirmed, he would replace outgoing Secretary Kristi Noem, who was fired earlier this month amid mounting criticism of her leadership of the Department of Homeland Security.

A look at key moments as Markwayne Mullin appears before the Senate for his Homeland Security confirmation hearing.

Sen. Markwayne Mullin appeared before the Senate Homeland Security & Governmental Affairs Committee on Wednesday for a confirmation hearing to replace DHS Secretary Kristi Noem. CBS News congressional reporter Taurean Small has more.

Markwayne Mullin, the White House pick for homeland security secretary, made a case to fellow senators Wednesday that he would be a steady hand for a department roiled by controversy under Kristi Noem,

Republican Kentucky Sen. Rand Paul, the Senate Homeland Security & Governmental Affairs Committee chairman, opened Sen. Markwayne Mullin's confirmation hearing to head the Department of Homeland Security with a personal rebuke of the Oklahoma senator's past comments about violence.

Oklahoma Sen. Markwayne Mullin faces a Senate committee Wednesday for his confirmation as Department of Homeland Security secretary.

Oklahoma Sen. Markwayne Mullin faced pushback from senators, including fellow Republicans, at his confirmation hearing for DHS secretary on Wednesday. CBS News homeland security correspondent Nicole Sganga reports.