When the General Assembly met in May 1838 at Philadelphia, the New School commissioners attempted to be seated but were forced to leave and convene their own General Assembly elsewhere in the city. The Old School and New School factions had finally split into two separate churches that were about equal in size. Both churches, however, claimed to be the Presbyterian Church in the USA. The Supreme Court of Pennsylvania decided that the Old School body was the legal successor of the undivided PCUSA.