From the Cleveland Plain Dealer:
"The station is making other changes in its syndication lineup. "Buffy the Vampire Slayer," "Angel," "Walker, Texas Ranger," "The West Wing" and "The Practice" are leaving the schedule because their syndication contracts have ended, said station manager Annie Keith."
It appears as as if WLNY Channel 55 and the CBS Affiliate have suspended "West Wing" reruns in the middle of airing Season 5. This leaves Bravo as the only source of older reruns. Before they were aired weekly around 12:30 AM ET on CBS and and at 6 PM ET on WLNY.