After three months, the war in Iran has reached a critical point. The conflict itself has become frozen in a way. The Islamic Revolutionary Guard Corps remains in control, and it does not seem to have been significantly weakened as a fighting force. Israel appears to have reduced operations in Iran, focused now on fighting Hezbollah in Lebanon. The Strait of Hormuz remains essentially closed, with some movement of vessels allowed by Iran and the United States, each in a position to block it but not to clear it. The peace negotiations have so far failed. The U.S. wants Iran to surrender its nuclear material and open up the strait; it has done neither. In short, neither side has done enough damage to compel the other into surrender.
From here, the war can go in one of three ways: One side cripples the other, a peace agreement is reached, or it becomes one of those permanent wars, lasting for many years with neither side willing or able to end it.
The question, then, is whether the U.S. is willing or able to launch a crippling attack on the IRGC. The flipside to that question is whether Iran thinks it can withstand such an attack. Considering Tehran has yet to capitulate, it probably believes it can.
So before the U.S. decides its next steps, it needs to determine whether it has the military capability to launch a crippling offensive, and whether it has the political capital to spend on such an attack.