Even as the Biden Administration engages Iran in an effort to reconstruct a nuclear deal, it also warns against the expansion of Iranian power in the region.
The ambitions of the Crown Prince are being thwarted more by regional realities than by Biden. The war in Yemen has not been going well for quite some time. His effort to reduce Iranian influence in Lebanon has failed, as has the Saudi support for efforts in Syria to overturn the Assad regime. The Crown Prince had an ambitious foreign policy agenda for reversing Iranian influence in the region. Those ambitions were probably increased when the Trump Administration came to power with its policy of "maximum pressure" on Iran. But that policy failed to bring Iran either to the bargaining table or to collapse.