What is "designated survivor"? At Trump's first State of the Union address, the "designated survivor" was the Minister of Agriculture.

On January 30, 2018 local time, US President Donald Trump delivered his first State of the Union address 。 Representatives from both parties of Congress, all justices of the Supreme Court, and senior military officials from the Pentagon were present. The tradition of "designated survivors" has been recorded since at least the 1980s. A cabinet member who meets the presidential qualification, that is, a person born in the United States and over 35 years old, will stay in a safe place outside Washington during important occasions such as the State of the Union address, and the security level will be in accordance with the President's specifications. In case of an accident, the President, members of the Cabinet and members of the parliament will be attacked at the Capitol and other places. This official will be able to give orders in an emergency. Theoretically, any cabinet member or cabinet level official who meets the requirements may be selected, but historically, most of the selected people come from newer departments such as the Department of Veterans Affairs, the Department of Homeland Security or the Department of Energy.