Trump named Sen. Markwayne Mullin to head the Department of Homeland Security after firing Kristi Noem amid his contentious immigration crackdown.

Iran is retaliating for the killing of top security official Ali Larijani. The country struck Israel, killing two and demonstrating their continued capacity to fight.

Iran retaliates for Israel's latest assassinations as Trump and Netanyahu give no indication the war is about to let up, 19 days in.

Follow the latest news and live updates as Markwayne Mullin, Trump's pick to replace Kristi Noem as DHS secretary, faces Senate questioning today.