“You want to talk about issues, but a lot of people want to talk about your gaffes,” Colbert said in confronting the Democratic presidential frontrunner over his "gaffe-machine" behavior. “Look, the reason I came on the Jimmy Kimmel show...," Biden said in joking about his gaffes. The former vice president extended his joke on Twitter, tweeting: "Thanks for having me on, @jimmykimmel." That prompted Kimmel to respond: "It was my pleasure Mr. Vice President. You are the #3 greatest rapper of all time. @JoeBudden."