"Is he lying, uninformed or incompetent? The answer is usually all three," one American studies professor said about the Oklahoma Republican.

The Republican from Oklahoma will be questioned by the Senate Homeland Security and Governmental Affairs Committee on Wednesday.

President Donald Trump tapped Sen. Markwayne Mullin, R-Okla., to replace Kristi Noem as the head of the Department of Homeland Security.

Markwayne Mullin said he regret belittling the death of anti-ICE protester Alex Pretti during a confirmation hearing to become the new head of the Department of Homeland Security…

President Donald Trump tapped Sen. Markwayne Mullin, R-Okla., earlier this month to replace Kristi Noem.

"Is he lying, uninformed or incompetent? The answer is usually all three," one American studies professor said about the Oklahoma Republican.