The establishment of Iran as a nuclear threshold state, and the deadly attack by Kataab Hezbollah in which three American soldiers were killed, express the failure of the Biden administration's policy towards Tehran. The mainstay of Biden's policy, which he already announced in his election campaign, was a return to the nuclear agreement with Iran.
Under Biden, the US is doing everything in its power not to break ties with Khamenei, and to appease him through the guise of generous concessions as part of vigorous courtship.