Iran has 92 million people. 3x the population size of Iraq, an army of 1 million, 90% of the population are Shia muslims (the vast majority of which support the regime), and a massive drone / missile industry.
This will be Iraq on steroids. Another multi year (if not decade) conflict that's going to destabilize the middle east, cause a massive refugee crisis, and destroy US foreign policy around the world. We will never recover.

And not only that, but a republican (and president Trump specifically doing this) is going to guarantee that the midterms will be won by the democrats, and we'll get another Obama 2.0 era. AT LEAST 8 years of democrat rule, except this time they'll import another 20 million illegals.

He's literally going to destroy America for Israel.