CinemaNow - The West Wing - Season 01 - Episode 12 - "He Shall, From Time to Time..."

The President and his staff prepare the State of the Union Address, but the President becomes ill. His naval doctor examines him in the living quarters. Mrs. Bartlet, a physician, orders various medical tests. She later reveals to Leo--and only Leo--that President Bartlet suffers from Multiple Sclerosis (MS). Later Bartlet further explains to Leo that his type of MS is called relapsing-remitting, and he experiences total recovery after attacks that are induced by fever and stress. Mandy informs C.J. that news of Leo's addiction will be made public. Leo conducts a press conference revealing his stay in the rehabilitation facility for alcohol and Valium addiction. Danny and C.J. kiss.