President Trump ordered warning signage placed at the National Museum of American History, part of the Smithsonian Institution, following a disputed White House report. The report characterized certain exhibits as reflecting "extreme political activism" and historical inaccuracies. The administration contends the museum's presentations contain partisan bias requiring correction through official notices.

Museum officials have not publicly responded to the directive. The move escalates ongoing tensions between the executive branch and cultural institutions over historical interpretation. Critics argue the order constitutes political interference in scholarly curation, while supporters view it as accountability for taxpayer-funded institutions.

The White House report cited specific exhibits but did not detail the proposed signage content or implementation timeline. Legal questions arise regarding executive authority over Smithsonian governance, which operates under a congressional charter. The Smithsonian comprises 21 museums and the National Zoo, with the American History Museum among its most visited.