Who is Markwayne Mullin? Trump's nominee for DHS secretary

And Gabe, can you tell us a little more about Senator Mullen of Oklahoma, obviously a Republican, what happens once he leaves the Senate. >> Well, a lot of questions on what happens uh what happens next. This just happened a short uh a short time ago.He of course is uh certainly in line with the president. Certainly known for uh border sec, you know, border security. um unclear exactly what conversations he may have had uh with President Trump over the last several uh days perhaps.We're still working that o ...