In re: What President Trump will achieve in Iran

Regime change was not a stated goal for the President Trump. It was always just an option. The Islamic republic will continue in Iran as it SHOULD.

However President Trump will ensure that those from within the current regime who take charge, with HIS approval, will align Iran's defence & foreign policy with US interests.

Doubters ignore the fact that Donald Trump is arguably the most consequential & unarguably one of the most consequential US Presidents.