Sometimes a defeat is as good as a victory. A veto here will destroy the US credibility as a fair broker of peace, will show that Israel/US are not ready for serious peace talks and when Abu Mazen turns to a different approach he will have the world 100% behind him. It's basic diplomacy.
Egypt to hold parliamentary election in 2 phases starting Oct 18-19 (Reuters)
from the article: Palestinian FM: Eight UN Security Council members support statehood bid