E1 should be a serious wake-up call for American policymakers, Michael Cohen argues below. If the controversial building project in the West Bank goes forward, he writes, it's time to start saying what everyone in Washington knows - the two-state solution will die and the U.S. risks supporting a future of apartheid. By Michael Cohen If there is one singular, yet frustratingly unattainable idea that has animated the Arab-Israeli peace process for the past two decades it is that of a two-state solution to the conflict – a Zionist and a Palestinian state living next to each other in peace…