President Donald Trump escalated his campaign to purge cultural institutions of materials that conflict with his political directives on Tuesday, alleging museums were too focused on highlighting negative aspects of American history, including “how bad slavery was.” In a Truth Social post, Trump directed his attorneys to conduct a review of museums, comparing the effort to his crackdown on universities across the country. “The Smithsonian is OUT OF CONTROL, where everything discussed is how horrible our Country is, how bad Slavery was, and how unaccomplished the downtrodden have been — Nothing about Success, nothing about Brightness, nothing about the Future,”...