A confirmation hearing is scheduled for Wednesday morning to determine if Markwayne Mullin will become the next U.S. Secretary of Homeland Security.

With Senator Markwayne Mullin's resignation, Oklahoma's governor will soon appoint a temporary replacement, while voters will decide the permanent successor in November.

Top intelligence officials will testify on Capitol Hill about the war in Iran, addressing the U.S. strike on an Iranian school and President Trump's claims of an imminent threat.

Markwayne Mullin is set to face a Senate confirmation hearing for the Department of Homeland Security leadership role.

Here's how to watch Markwayne Mullin's confirmation hearing scheduled for March 18.