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When will President Obama abandon the Bush doctrine of isolating Hamas? During a press conference in Gaza City a few weeks ago, Ismail Haniya, the Hamas leader in the Gaza Strip, declared: “If there is a real project that aims at resolving the Palestinian cause on establishing a Palestinian state on 1967 borders, under full Palestinian sovereignty, we will support it.” And in an interview shortly after, Khaled Meshaal, the exiled leader of Hamas's political bureau, welcomed the “new language towards the region” from President Obama.

Hamas is trying to convey to the US its willingness to accept a two-state solution to the Israeli-Palestinian conflict, and that it is willing to play a productive rather than obstructionist role in the peace process. But is the US...