It is not over until its over, but at least for the moment, it appears that the "Maximum Pressure" policy towards Iran has more or less failed. Not that any other policies have been notably successful,
To review the bidding, at the conclusion of the 1991 Gulf War, the Saudis convinced Bush the Elder not to push to Baghdad, for fear that Saddam's Sunni regime would be replaced by a Shiite regime more friendly to Iran. In the 2003 Gulf War, the Iranian agent Chalabi convinced Bush the Younger to push to Baghdad, in hopes that Saddam's Sunni regime would be replaced by a Shiite regime more friendly to Iran.
By the end of the 2010s, the Shia crescent stretched from Western Afghanistan in the East to the shores of the Mediterranean in Lebanon [and don't forget Yemen].
Maximum Pressure, to the extent it had an objective beyond undoing whatever Obama had done, hoped to pressurize some sort of regime change in Iran [on 21 May 2018 US Secretary of State Mike Pompeo issued an ultimatum of a dozen demands that amounted to such, even if not requiring an American victory parade in downtown Tehran].
By drastically reducing Iran's oil income, it was hoped that the regime would become more malleable, somehow.
From the outset of the Iranian Revolution, America has been called the Great Satan. After the decades of American sponsorship of the Shah's government, there was some logic to this, and surely American support for Saddam during the Imposed War would have confirmed this judgement.
Satan himself has many names, among them the Prince of Lies and the Great Deceiver.
Trump has stated he wanted to negotiate with Iran, but Iran's Supreme Leader has ruled out further negotiations. Not to put too fine a point on the matter, but Trump probably comes as close to a personification of a Prince of Lies as might be expected. What purpose could be served in negotiating with the Great Deceiver?
Towards the end of 2019 there were nearly simultaneous popular uprisings In Lebanon, Iraq and Iran, all more or less against the existing dispensation created by the Islamic Republic. As of Boxing Day 2019, the result was new Prime Ministers in Lebanon and Iraq who were both even more friendly to Tehran than their predecessors. And in Iran, over a thousand protesters have been slain by a government that intends to retain power by any means necessary [for those doing the Lord's work, any other course would be unthinkable].
Hard to see where things go from here, unless the Hidden Imam returns from Occultation.