Receive Breaking News updates as they occur
By Jonathan Allen and John Whitesides WASHINGTON (Reuters) - U.S. Senator Bernie Sanders on Monday urged his supporters to back former rival Hillary Clinton's White House bid, but drew jeers from his supporters as dissent enveloped the opening day of the Democratic Party's convention. Sanders' followers shouted "We want Bernie" in a show of anger at both Clinton's defeat of him in the presidential nomination race and emails leaked on Friday suggesting the Democratic leadership had tried to sabotage Sanders' insurgent campaign. For months, Sanders, 74, mounted an unexpectedly tough challenge to Clinton, 68, a former secretary of state, who this week will become the first woman nominated for president by a major U.S. political party.