Hillary Clinton and Bernie Sanders formally declared an end to their political rivalry Tuesday, joining forces to take on a shared enemy: Donald Trump. "I have come here to make it as clear as possible why I am endorsing Hillary Clinton and why she must become our next president," Sanders said at a joint rally here. "Secretary Clinton has won the Democratic nomination and I congratulate her for that." The 74-year-old self-described democratic socialist, who has been a thorn in Clinton's side over the last year, pledged to support his former rival through Election Day: "I intend to do everything I can to make certain she will be the next president of the United States." Read more http://www.cnn.com/2016/07/11/politics/hillary-clinton-bernie-sanders/index.html