I think one thing that Trump may have in his favor vs Iraq is that the goal is not stability. It is to destroy the Iranian nuclear capacity.
Bush’s argument was not just WMD’s but also regime change to free the Iraqis from a brutal dictator. If you pretend to be acting in the best interest of a country, you have tied your goals to stability.
Trump may just say to hell with Iranians as long as they don’t develop nukes or continue to threaten US interests.
That isn’t a morally sound goal but something that may be achievable without boots on the ground.