The claim is true because multiple reliable news sources from July 24, 2026, report that President Donald Trump ordered the installation of warning signs outside the Smithsonian's National Museum of American History to alert visitors that some exhibits are inaccurate according to his administration's view.
Trump just ordered warning signs and exhibits to be installed outside the Smithsonian's National Museum of American History to alert the public that the museum does not, in his view, accurately reflect American history.

Trump escalates Smithsonian attack with order for signs outside history museum | Donald Trump | The Guardian
Source: theguardian.com
Key Evidence
The Washington Post and The Guardian both confirm Trump ordered warning signs outside the Smithsonian museum.
NBC News and Reuters report that the signs will inform visitors about alleged inaccuracies and direct them to alternative information.
Multiple sources note this is part of an ongoing criticism by Trump's administration regarding historical narratives presented by the Smithsonian.
What the Evidence Shows
On July 24, 2026, several reputable news organizations including The Washington Post, The Guardian, Reuters, NBC News, and others reported that President Donald Trump issued an order directing federal officials to install signs outside the Smithsonian National Museum of American History. These signs are intended to warn visitors that the museum's exhibits do not accurately reflect American history as per the Trump administration's perspective.
The order is part of a broader dispute over how American history is portrayed by the Smithsonian institution. The signage is also said to direct visitors to alternative resources that the administration considers more accurate. This action follows a White House report criticizing the museum's historical depictions and aligns with a previous executive order from March 2025.
The consistency across multiple independent sources confirms the factual basis of this claim.