The US has certainly been drifting toward a less supportive position, for sure. Carolyn Glick pulls no punches here.
After going through the tired motions of pledging support for Israel, "when it matters," [US ambassador to the UN] Power refused to rule out the possibility that the US would support anti-Israel resolutions in the UN Security Council to limit Israeli sovereignty and control to the lands within the 1949 armistice lines — lines that are indefensible.
Such a move will be taken, she indicated, in order to midwife the establishment of a terrorist-supporting Palestinian state whose supposedly moderate leadership does not recognize Israel's right to exist, calls daily for its destruction, and uses the UN to delegitimize the Jewish state.
In other words, the Obama administration intends to pin Israel into indefensible borders while establishing a state committed to its destruction.
A key to understanding this position is that the pre-1967 borders are, if not indefensible, certainly very difficult to maintain. Another key is that some Zionists favour continued expansion into the West Bank. But to demand that Israel give up its buffer zone is tantamount to asking it to commit suicide or, at the very least, to suffer continued huge losses trying to defend itself within those pre-1967 borders.