She mansplained him. “Let me translate that if I can,” Hillary Clinton said dryly after Donald J. Trump talked up his tax plan.

She interrupted him. When Mr. Trump boasted of the gilded Las Vegas hotel that bears his name, Mrs. Clinton leaned into her microphone. “Made with Chinese steel,” she quipped with a smile.

She mocked him. After Mr. Trump said President Vladimir V. Putin of Russia had “no respect” for her, Mrs. Clinton slyly posited why Mr. Putin seemingly preferred Mr. Trump: “He’d rather have a puppet as president of the United States,” she said.