In a deliberate shift from episodic pressure to sustained rhythm, the Trump administration has begun sanctioning Iranian financial institutions on a weekly cadence, with Treasury Secretary Jay Bessent signaling that no corner of Tehran's economic life — banking, aviation, or beyond — will be permitted to rest undisturbed. The strategy is less a single act of force than a kind of institutional siege: methodical, public, and designed to make uncertainty itself a form of pressure. History has long shown that isolation, when made predictable, can reshape the calculations of nations — though it jus