The Oklahoma senator's confirmation hearing for DHS secretary got off to a combative start, as committee chair Rand Paul went after Mullin over remarks he made praising the neighbor who tackled and injured the Kentucky senator.

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.