President Obama, through his whole part, though he omits the most crucial factor: Gorbi et al. lost the fervor to send the tanks rolling on civilians that his predecessors had. From a geopolitics perspective, he is more right than the other statement.
Though irrelevant to the geopolitics, Lynn Cheney is right, too, up through the sentence ending with "escaping." In the developing post-colonial world, Soviets and Americans were equally perfidious.