The president signed an executive order this year ordering the removal of "improper ideology" from the museum system.

The White House is conducting an expansive review of the Smithsonian’s museum exhibitions, materials and operations ahead of America’s 250th anniversary to ensure they align with Donald Trump’s view of history.

The assessment, which was first reported by The Wall Street Journal and confirmed to NBC News, will include reviews of online content, internal curatorial processes, exhibition planning, the use of collections and artist grants, and wording related to museum exhibit messaging.

The Smithsonian Institution includes 21 museums, 14 education and research centers and the National Zoo.