: The Republican side sees the rise of Senator Arnold Vinick , a moderate Californian who presents a formidable challenge to the Democrats.
: Following a heart attack during the summit, Leo steps down as Chief of Staff. In a surprising move, Bartlet appoints Press Secretary C.J. Cregg as his successor, forcing her to navigate a steep learning curve and the President's worsening multiple sclerosis. The West Wing - Season 6
Season 6 introduced several significant characters who reshaped the show's dynamic: : The Republican side sees the rise of