President Trump defended a provocative speech he delivered this month, in which he mocked the testimony of a woman who accused now-Supreme Court Justice Brett Kavanaugh of sexual misconduct more than three decades ago, saying the speech is the reason Mr. Kavanaugh was confirmed.

Mr. Trump, speaking in an interview that aired on “60 Minutes” Sunday night, called it “the famous Mississippi speech,” adding, “Had I not made that speech, we would not have won.”

“The...