>> Bernie Sanders' insurgent campaign transformed the Democratic party primary from what might have been a quiet coronation into a noisy barnstorming brawl over the future of America. But the sun set on Sanders' presidential hopes, and on Tuesday, he officially endorsed Hillary Clinton in a joint appearance alongside the presumptive nominee.
>> Secretary Clinton has won the Democratic nominating process.>> Reuters' political correspondent Luciana Lopez.>> For the Hillary Clinton campaign, a Bernie Sanders endorsement is actually a very big get. One of the big questions going into the Democratic Convention is what would Bernie Sanders and his millions of supporters do?
His endorsement means that a large number of them will now be taking a much closer look at Hillary Clinton than maybe they would have before.>> Many who rallied to the Vermont senator did so, precisely because his values and vision appeared directly opposed to the party establishment. The banners read, Bernie or Bust, not go along to get along.
But Sanders was resoundingly beaten in the primary. And even Bernie Sanders prefers Hillary Clinton to Donald Trump.>> Hillary Clinton will make an outstanding president. And I am proud to stand with her today. Thank you, all.>> The joint appearance in Portsmouth, New Hampshire, Tuesday, comes after Clinton, last week, adopted elements of Sanders' plans for free tuition at public colleges and expanded affordable health care.
But a recent Reuters Ipsos poll shows only about 40% of Sanders' supporters say they will back Clinton, meaning Clinton needs her formal rival to shepherd his flock behind her in the general election.>> Bernie! Bernie!