President Donald Trump has sought to exert control over the Smithsonian Institution and its museums, particularly as it relates to slavery and other dark periods in the nation’s past.

A White House report details what the administration wants to change in museums—and suggests that a crackdown could be coming.

A year after President Donald Trump vowed to overhaul the narrative at the Smithsonian, the administration's 160-page critique reveals an attempt to sanitise American history,…