Good one!
He is an idiot and the sooner the rest of the nation catches on, the better.
The starting point is the legal boundry:
As part of a final peace settlement, Israel must have secure and recognized borders, which should emerge from negotiations between the parties in accordance with UNSC Resolutions 242 and 338. In light of new realities on the ground, including already existing major Israeli populations centers, it is unrealistic to expect that the outcome of final status negotiations will be a full and complete return to the armistice lines of 1949, and all previous efforts to negotiate a two-state solution have reached the same conclusion. [That's the passage whose existence or binding effect Mrs. Clinton denies. CiJ]