With the first debate scheduled to take place a month from now near New York, Clinton joked about what to expect from her unorthodox opponent.
“You’ve got to be prepared for wacky stuff. I’m planning on drawing off my experiences from elementary school,” she said on late-night talk show Jimmy Kimmel Live.
Trump has suggested he might not attend all of the three scheduled debates.
But he is trailing badly in the polls and the highly watched events offer a much-needed chance to break through with undecided voters.
For a first-time debater, this cauldron of presidential political theater could present a daunting challenge.
Trump has thrown a series of barbs at Clinton, describing her as “crooked” and making opaque suggestions lately that she has unspecified health problems.
Host Kimmel asked Clinton to open a jar of pickles to show she was in good health as she brushed off a scandal over emails sent from a private server when she was secretary of state.