The director of the National Portrait Gallery has resigned from her post, according to a memo sent to Smithsonian employees and obtained by CNN.

Kim Sajet’s resignation comes days after the Smithsonian said it would review content across its museums, which the White House has slammed as being influenced by “divisive, race-centered ideology.”

Sajet said it was “not an easy decision” but “the best way to serve the institution I hold so deeply in my heart”