The head of a presidential library resigned this week after a tug-of-war with the Trump administration over gift selection and a sword for King Charles III, sources familiar with the matter told CBS News.

Todd Arrington, a career historian who previously held posts with the National Park Service and National Archives and Records Administration, stepped down on Monday as director of the Dwight D. Eisenhower Presidential Library, Museum and Boyhood Home.

Sources said Arrington’s departure came after he resisted taking an original Eisenhower sword out of the library’s collection to give to King Charles last month during President Trump’s unprecedented second state visit to the United Kingdom.