As America celebrates its 250th, Smithsonian leader Lonnie Bunch treads a fine political line

By René Marsh, CNN (CNN) — For over a year, Lonnie Bunch III, the head of the storied Smithsonian Institution, has been at the center of a political tempest. Under President Donald Trump’s second administration, the world’s largest museum institution and a key voice in shaping the narrative of America’s history has been under pressure