On July 4th, America's 250th birthday, the White House published a report on its own website calling the Smithsonian's National Museum of American History "un-American." The report, authored by the Domestic Policy Council, said the museum focuses too much on Black and Brown communities, immigrants, women, and LGBTQ Americans, and accused it of dividing the country. Marc Stein is the president of the Organization of American Historians, the nation's largest and most prestigious group of profe...