Mr. Trudeau spoke in some detail about his relationship with Mr. Trump and rejected the widespread perception that the president does not listen to opposition views, prompting laughter from some in the audience. But he argued that, at least in his experience, Mr. Trump had remained consistent.

“I have always found that whenever he has made an engagement to me or a commitment to me on the phone or in person, he followed through on that, and that is someone you can work with,” Mr. Trudeau said.