'Hey,' Obama said several times, trying to get his audience back. 'Listen up.'
As rally-goers continued to defy him, Obama grew angrier and angrier, eventually demanding that attendees of the Hillary Clinton campaign event sit down and be quiet.
'Hey everybody, hey,' he said, trying again. 'I told you to be focused, and you're not focused right now. Listen to what I'm saying.'When the crowd refused to listen, he angrily demanded that 'everybody be quite for a sec.'
'Now listen up. I'm serious, listen up. You've got an older gentleman who is supporting his candidate. He's not doing nothing wrong,' Obama proclaimed. 'You don't have to worry about him. This is what I mean about folks not being focused.'
'First of all...hold up, hold up,' Obama said. 'First of all, we live in a country that respects free speech.'
'Second of all, it looks like maybe he might have served in our military, and we've got to respect that. Third of all he was elderly and we've got to respect our elders. And fourth of all, don't boo...'
'I want you to pay attention. Because if we don’t, if we lose focus, we could have problems. This is part of what’s happened here during this election season. We just get stirred up for all kinds of reasons that are unnecessary,' he said to laughter. 'Just relax.'
'We can't afford a Commander-in-Chief who insults POWs, who attacks a Gold Star mother, who actually talks down our troops, says he knows more than our generals,' Obama said.
'I had to sit down with somebody who explained this whole nuclear thing. It will sober you up,' he said. 'It’s serious business.'
'We can't have somebody like that handling our nuclear codes. We can't have somebody who gets upset because “Saturday Night Live” does a skit about him and starts tweeting at three o’clock in the morning. That's not the temperament that you want for somebody who has got the nuclear codes.'More photos below...