When Bernie Sanders addresses throngs of supporters who gather at his rallies, the divisions that plague the Democratic Party can feel far away. Speaking at a concert for Sanders on Friday night, Rep. Rashida Tlaib, D-Mich., led sustained booing from the stage at the mention of Hillary Clinton, his rival in the 2016 primary. Rep. Alexandria Ocasio-Cortez, a New York Democrat who has campaigned for Sanders across Iowa, says the Democratic establishment should conform to the progressive movement, not the other way around.
