... any more than George H.W. Bush was catalyst for the collapse of communism in Europe. No, much of the credit for both goes to their predecessors -- Reagan and George W. Bush -- though media meme of Obama taking office as basis for upheaval in Iran will surely take hold instead.
Just as Reagan was the pivotal figure in bringing down Iron Curtain, even though it did not occur until after Reagan left office, the younger Bush was pivotal in bringing down Iran Curtain, if that is what we are witnessing. And to carry analogy further, Obama is reacting with much the same caution as George H.W. Bush after the collapse of the Berlin Wall.