The White House is conducting a comprehensive internal review of exhibits and materials at the Smithsonian Institution in an effort to comply with President Donald Trump’s directive about what should and shouldn’t be displayed.

In a letter addressed to Lonnie G. Bunch III, the Secretary of the Smithsonian, White House officials said they would lead a “comprehensive internal review” of Smithsonian museums and exhibitions, focusing on areas including public-facing content, the curatorial process, and exhibition planning, among others.

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