Erik Nielson, writing at the Huffington Post, says that President Obama deceived many who supported him during his first presidential campaign, including hip-hop artists. He says that Obama's policies haven’t helped the minorities who elected him to office. There was something remarkable about seeing rappers pledge their support to a mainstream presidential candidate, especially given the history of antipathy between national politicians and hip hop. And, of course, there was something equally remarkable about watching a future president embrace hip hop culture. Indeed, whereas politicians on both sides of the aisle had made a political tradition out of demonizing hip...