For decades the US has been pushing for two-state solution of the Israeli-Palestine conflict and there are no other alternatives seem to be avialable for achieving peace in the MENA region. The end of the road will be taking up the issue in the UN as all negotiations, options and details have been fully assessed.

http://www.washingtonpost.com/politics/obama-dismisses-netanyahus-softened-stance-on-two-state-solution/2015/03/21/27f0148a-d02e-11e4-8c54-ffb5ba6f2f69_story.html