“The titles are a mouthful.
There’s the deputy director exercising the authority of director for the National Park Service, and the senior official performing the duties of the director at U.S. Immigration and Customs Enforcement.
This is how President Trump is filling dozens of high-level jobs in the federal government without Senate confirmation. The administration leaves key jobs vacant at a given agency, while delegating the authority of those positions down to subordinates who do not need to be confirmed or even nominated for the jobs.”