Sanders says Clinton 'must become' next US president

Vanquished White House hopeful Bernie Sanders on Monday told a riven and lively Democratic convention that his rival Hillary Clinton must become the next US president.

To cheers and some boos, Sanders said that "based on her ideas and her leadership," Clinton was a better choice than Donald Trump and "must become the next president of the United States." 

"The choice is not even close," he said. "This election is about which candidate understands the real problems facing this country and has offered real solutions -- not just bombast, not just fear-mongering, not just name-calling and divisiveness."