During his 2018 address, Trump picked Agriculture Secretary Sonny Purdue as the designated survivor.
But this year, the pool of eligible survivors is a bit shorter than usual due to multiple vacancies in the president's cabinet.
Perry, who became secretary of energy in March 2017, and twice ran for president during Republican primaries in 2012 and 2016, will spend the evening in a secure, secret and remote location.More news: The Leading Goalscorers In El Clasico History
Acting Cabinet officials, of course, can still attend the State of the Union.
Of the 15 executive department heads specified under the law as being eligible, three are now headed by acting leadership, and another is constitutionally ineligible.
Secretary of Energy Rick Perry is the designated survivor for the 2019 State of the Union address. With members of Congress, Supreme Court justices, the cabinet and joint chiefs of staff all in one room, one person is hidden away in a secure location to ensure that government can continue if the worst were to happen. That matters because the designated survivor, by law, must be a Senate-confirmed Cabinet member.More news: Watchdog: 4 Trump Mar-a-Lago Trips in 2017 Cost Taxpayers $14M
The president picks one Cabinet member each year to be the "designated survivor" during the State of the Union address in case a disaster or attack incapacitates the top government officials gathered at the Capitol. That means that Transportation Secretary Elaine Chao can't be the designated survivor, because as a naturalized citizen, she is ineligible for the presidency.
Lu would also examine the themes of Obama's speech and try not to ask a Cabinet official whose policy areas would be featured to sit out the address.More news: Aaron Judge would change positions to add Bryce Harper