"Well I have much better judgment than she does. There's no question about that. I also have a much better temperament than she has," he said, prompting some chuckles in the crowd.
"I have a winning temperament. I know how to win. She does not know how to win. The AF of L CIO, the other day behind the blue screen — I don't know who you were talking to, Secretary Clinton — but you were totally out of control. I said there's a person with a temperament that's got a problem," Trump said.
"Woo, OK," Clinton responded.
She then pivoted to discuss NATO and her diplomatic record. In particular, the former secretary of state emphasized how collaborating with other nations creates political progress without the need for military intervention.
She contrasted her approach with comments Trump has made on the campaign trail including threatening to blow Iranian sailors "out of the water" for "taunting" U.S. sailors.
"That's not good judgment. That is not the right temperament to be commander-in-chief," Clinton said.
This is a developing story. Please check back for updates.