It was Harding in 1920. The one who didn't succumb was Reagan.
For a good write-up on this, visit The San Fernando Valley Folklore Society's Urban Legends Reference Pages at www.snopes.com (definitely one of the better Urban Legend sites)
The page for the 0-year curse is
http://www.snopes.com/spoons/fracture/curse.htm
Post a response to this discussion thread