Donald Trump on Friday ordered the interior department to display signs in front of the Smithsonian National Museum of American History that accuse the institution of inaccuracy.

The order escalates the Trump’s attacks against the Smithsonian, which he and his allies accuse of politicizing the institution by focusing too much on injustices in American history, instead of more triumphant moments such as the signing of the Declaration of Independence.

The order directs interior secretary Doug Burgum to huddle with the National Park Service and assistant to the president for domestic policy Vince Haley to come up with some temporary signs to install along the National Parks Service-maintained sidewalks and walkways leading into the museum.

The White House did not immediately respond to a request for more details about what these signs would say.

The order says the signs “shall notify visitors that the museum exhibits should be renovated consistent with the findings in the report”. The signs should direct the public to other places where they can get better American history information, the order says.

The same group will also have to produce signs for the public criticizing the Smithsonian for not commemorating sufficiently the Declaration of Independence during the 250th anniversary of its adoption.

The American Historical Association, a group composed of professional historians, praised the Smithsonian Institution’s “commitment to scholarship and accuracy” in a statement earlier this month.

“Historians practice our craft with scholarly integrity according to established standards of evidence, historical inquiry, and professional practice,” the AHA statement reads. “Political interference in professional museum work threatens the accuracy of historical interpretation and erodes public trust in one of our nation’s most important institutions.”

The National Museum of American History declined to comment.

But the museum’s director, Anthea Hartig, defended the institution’s interpretations in a pair of congressional hearings earlier this month, where Republican representatives fumed about “some overtly sexual things up there” and accused Hartig of encouraging “self-loathing”.

“We honor the declaration, the revolution, the constitution, our national symbols,” Hartig responded, according to the New York Times. “And we tell the truth about the times that the country fell short of its own founding ideals. Telling our story fully is a form of respect for the American people and a commitment to constantly being in pursuit of a more perfect union.”

A recent report prepared by the White House’s domestic policy council called “Saving America’s Story” accused the museum’s leadership of “ideological capture”.

The Smithsonian “explicitly adopted an ideological framework that no longer treats the American story as a shared national inheritance to be taught or celebrated, but as a political instrument to divide, dispirit, and discourage our citizens”, the report says.