"<a href=""http://www.cnn.com/2015/04/28/politics/bernie-sanders-2016-election-announcement/index.html"">Sen. Bernie Sanders</a>, an independent from Vermont who caucuses with Democrats, has said the United States needs a ""political revolution"" of working-class Americans looking to take back control of the government from billionaires. He first announced the run in an email to supporters early on the morning of Thursday, April 30."