III. Regime change
These are what the US Foreign Policy in Perspective calls covert actions. When the US doesn't have a good justification for the world and her own citizens to act overtly. This part discusses how to seed local movements to topple the current Islamic revolutionist regime. One main problem: there is no real candidate, a charismatic leader to rally support around, and put forward as an opposing pole to Khameini and the supporting structure.
1. popular uprising
Since the Iranian Islamist regime is widely despised by the whole country, it seems possible to fan these negative emotions and spark a revolution. Iran has her revolutionary past too. The book notes that while many revolution happened in history, it is really not clear what leads to them, and even less clear how to reproduce the process "artificially". So it is more theoretical than anything.
This was in 2009 but how I see it, compared to US Foreign Policy in Perspective (published same year), in the meantime the US developed a new policy tool. Even back then they surely experimented with this. I try to list some:
Bulldozer Revolution (Serbia 2000), Rose Revolution (Georgia 2003), Orange Revolution (Ukraine 2004), Tulip Revolution (Kyrgyzstan 2005), Arab Spring (Middle EAst, 2011), Maidan (2013-14) - as far as I know all had some level of US/Western meddling. At the least via USAID and NGOs.
I think if not by 2009, but by today, they have a procedure to follow if they want to push a revolution in a country. Even here, opposition is/was hoping a colour revolution would happen which removed the Orbán government.
Anyway possible groups in the country: reformists, intellectuals, student, labor, civil society organizations. Maybe put forward Reza Pahlavi, the son of the last shah.