Horse racing runs this town.
I have friends that are owners. The stud fees are too high to run a shit track like Pimlico and possibly shorten the racing life of the Derby winner. Sovereignty is a Saratoga horse, so it makes sense to skip that dump in Baltimore and recover and train here for the Belmont.
Throw in a successful post 3 year old career with Breeders Cup success, and trying to win the Triple Crown just doesn't measure up financially.