It's official. U.S. Senator Bernie Sanders on Tuesday endorsed former presidential rival Hillary Clinton as the Democratic nominee ahead of the party's July convention. Sanders said Clinton will make an outstanding president and that he is proud to stand with her. "Hillary Clinton understands that if someone in America works 40 hours a week, that person should not be living in poverty," Sanders added. CNN reports: "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 his support to his former rival: "I intend to do everything I can to make certain she will be the next president of the United States." Clinton, speaking after Sanders, declared: "We are joining forces to defeat Donald Trump!" "I can't help but say how much more enjoyable this election is going to be when we are on the same side," she said. "You know what? We are stronger together!" Full remarks of Sanders can be found on this blog post.