Regime change is hard. If you don’t believe me, just ask Juan Guaido.
Venezuela and Iran are similar in that Trump has committed our country to an aggressive course of action without providing a plausible Plan B short of war. In Venezuela, it appears that he is willing to tolerate a slow defeat; Brazil and Colombia aren’t interested in fighting his battle for him, he can’t abide invasions and occupations, and no one would take a nuclear threat seriously, so what other choice does he have? With Iran, however, he has MBS, MBZ, Bibi, Bolton, and Pompeo baying for war, no diplomatic support, and an adversary with a nuclear program, a finger on the world’s supply line, and no interest in negotiations. The result, therefore, will be different.