S6, E10: The press circulates an untrue rumor about C.J. A controversial amendment banning gay marriage is added to the budget. Josh convinces Santos (recurring guest star Jimmy Smits) to vie for the office of President. Bartlet tries to handle his latest recurrence of multiple sclerosis. And Donna works for Vice President Robert Russell (recurring guest star Gary Cole) in his New Hampshire presidential campaign headquarters. Series star Bradley Whitford wrote the episode.