The Smithsonian put up new text on Friday that changed its description of President Trump’s impeachment following the Jan. 6, 2021, attack on the Capitol.

The new text removed previous references to Mr. Trump’s incitement charge being based on “repeated ‘false statements’ challenging the 2020 election results” and giving a speech that “encouraged — and foreseeably resulted in — imminent lawless action at the Capitol.”

The new label reads: “On Jan. 13, 2021, Donald Trump became the first president to be impeached twice. The charge was incitement of insurrection based on his challenge of the 2020 election results and on his speech on Jan. 6. Because Trump’s term ended on Jan. 20, he became the first former president tried by the Senate. He was acquitted on Feb. 13, 2021.”

The change came after the National Museum of American History in Washington last month took down a temporary addition to an exhibition about the American presidency that referred to President Trump’s two impeachments to update it as part of what museum officials described as a review of the institution’s content for bias.

The new labeling that went up on Friday also changed the description of President Trump’s first impeachment, in 2019, adding the word “alleged” to a line that now reads: “The charges focused on the president’s alleged solicitation of foreign interference in the 2020 presidential election and defiance of Congressional subpoenas.”