Their combined leverage is such that any Isreali government would have to yield. Obama merely has to make his case to the Americian people : Greater Israel is a non starter. Such boarders only existed for short time, a long time ago in history. There is no moral or legal justification for its resurrection. Sure people are entitled to a religious perspective, but not when it impacts so harshly on the people of other tribes and religions.
Israeli forces demolish illegal houses, power infrastructure in Palestinian village Aqaba (Haaretz)
from the article: Is the U.S. prepared to pay for peace?