POTUS signs an EO on April 14, 2020.

https://www.whitehouse.gov/presidential-actions/executive-order-providing-order-succession-within-department-interior/

>>Secretary of the Interior (Secretary) during any period when both the Secretary and the Deputy Secretary of the Interior have died, resigned, or are otherwise unable to perform the functions and duties of the office of Secretary.

Meet David Bernhardt. A real SMUG FKR.

>>An official investigation into ethics violations by Trump's new Secretary of the Interior was opened just four days after his confirmation

https://www.outsideonline.com/2390596/david-bernhardt-scandal-tracker