No American President, Republican or Democrat is going to put the well-being of the USA on the line for Israel. To date, USA mindless support for Israel has not really cost the USA too much, but this is changing. International nuclear prolification is not in the interests of the USA and if efforts to reduce nuclear weapons from other states is to succeed, Israel will not be left out of the equation.
UN: Satellite images show Temple of Bel in Syria 'destroyed' (AP)
from the article: Israel's atomic arsenal could fall victim to a new U.S. nuclear policy