One of the prime candidates to succeed as the next President of the Palestinian Authority, Kidwa, states that if the United States continue with its plan to move the Embassy to Jerusalem, then the PA would be forced to end ties with the United States and no longer view them as a legitimate broker in the Peace Process and would instead turn towards the UN.
http://www.jpost.com/Arab-Israeli-Conflict/Fatah-official-to-Pal-leadership-Downgrade-US-ties-if-embassy-is-moved-479352