(Obama) will try to make a deal with Tehran letting it do limited enrichment and drop sanctions in exchange for promises not to develop nuclear weapons. The choice is up to Tehran as to whether to negotiate a deal or simply use talks as one more stalling technique while continuing to hurry toward getting deliverable nuclear weapons. When Iran does get nuclear weapons he won’t do anything, including never supporting an Israeli attack.
What he should do: If he wants to negotiate, first gain credibility in Tehran by being tough on Iranian interests everywhere in the region—he’s doing this in Syria–and bargain toughly rather than do anything to get a deal. When Iran does get nuclear weapons put in place a really tough containment system that would counter Iran’s subversion and terrorism, give strong backing to the internal opposition, and squeeze Iran to the maximum extent. If an honest assessment shows an Iranian plan to attack Israel or if Tehran seems likely to give nuclear bombs to terrorists, the U.S. government should support an Israeli attack. By not being credible, Obama makes more likely Iran’s obtaining nuclear weapons and that outcome leading to war.
Shall we go on? Well, the U.S. government will go on doing these things for the next four years.