Joe Biden, weighing a 2020 White House bid, once advocated continued school segregation in the United States, arguing that it benefited minorities and that integration would prevent black people from embracing “their own identity.” Biden was speaking in 1975, when he opposed the federally mandated busing policy designed to end segregation in schools. In the past few decades, he has claimed he wanted desegregation but believed the policy of busing would not achieve it. Last year, he stated he had voted heroically to protect busing.