Former President Bill Clinton stopped by CBS's "Late Show with David Letterman" Tuesday for a farewell to the retiring host.
Letterman asked Clinton to "put it in a percentage — what's the chance of you moving back to 1600 Pennsylvania?"
Clinton laid out a path that could bring him back to the White House, starting with, "First of all, Hillary has to win the nomination."
"If she wins the election, the chances are 100 percent I'll move back — if I'm asked," Clinton said. "My experience is, since I've left the White House, when a president of either party asks, you say yes. So I hope I'll be invited. It'll be a good thing for America if she won, I hope she does."
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