Another comment by Obama -- "Meanwhile, Donald Trump calls our military a disaster" -- draws boos from the delegates.
As Obama says, "And then there’s Donald Trump," the crowd boos.
He tells them, don't boo, vote!
The crowd cheers and laughs.
Obama also works in some kudos for Clinton's vice presidential choice, Tim Kaine.
"Tim Kaine is as good a man, as humble and committed a public servant, as anyone I know. He will be a great vice president, and he’ll make Hillary a better president. Just like my dear friend and brother Joe Biden has made me a better president."
"And that’s why I can say with confidence there has never been a man or a woman more qualified than Hillary Clinton to serve as President of the United States of America," Obama says again, the same line he used in endorsing Clinton a month ago.
The crowd cheers loudly.