White House names Sec. Sonny Perdue as designated survivor

The designated survivor for tonight's State of the Union address is Secretary of Agriculture Sonny Perdue.

Background: The designated survivor is the member of the cabinet who will spend the speech at a secret location and be ready to assume the duties of president in case of attack on the speech site that incapacitates the president and other officials in the line of succession.

• Flashback: When Trump first addressed Congress last year, United States Secretary of Veterans Affairs David Shulkin was the pick