Department of Homeland Security Secretary Markwayne Mullin is testifying before the Senate on the agency's budget Tuesday.

Mullin got into a heated exchange with Senator Patty Murray.

Department of Homeland Security Secretary Markwayne Mullin is testifying before the Senate on the agency's budget Tuesday.

Homeland Security Secretary Markwayne Mullin is set to appear in the Senate to discuss the agency's budget.

The former senator's testimony will mark his first appearance on Capitol Hill as the new homeland security secretary.

Watch live as DHS Secretary Markwayne Mullin appears before the Senate Appropriations Committee to defend and discuss the Department of Homeland Security's proposed Fiscal Year…

A tense exchange unfolded during a Senate Appropriations Committee hearing as DHS Secretary Markwayne Mullin responded directly to opening remarks from Sen. Chris Murphy (D-CT).…

Secretary of Homeland Security Markwayne Mullin sparred with Sen. Chris Murphy (D-CT) on the topic two different times during the hearing.