Bernie Sanders launches second Democratic U.S. presidential bid

Sanders, 77, announced his candidacy in a lengthy early morning email to supporters, pledging to build a vast grassroots movement to confront the special interests that he said dominate government and politics. "Our campaign is about creating a government and economy that works for the many, not just the few," Sanders said in the email, asking for 1 million people to sign up to start the effort. The senator from Vermont launched his insurgent 2016 candidacy against Clinton as a long shot, but ended up capturing 23 state nominating contests and pushing the party to the left, generating tension between its establishment and liberal wings that has not entirely abated.