In the grand scheme of things 3 months is not infinity. I think Israel should freeze construction for 3 months contingent upon Abbas' and Obama's agreement that it would be the last time Israel would be asked to freeze. That would reveal for all to see Abbas' tactic. He has no intention to reach a peace agreement. He wants to keep the money coming in to the West Bank and peace talk insures it. I have no idea what is in Obama's head; maybe nothing.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: Abbas: No peace talks without East Jerusalem construction freeze