Robert Kagan writes:

I can think of nothing more perilous to American democracy right now than going to war. Think of how Trump can use a state of war to strengthen his dictatorial control at home. Trump declared a state of national emergency in response to a nonexistent “invasion” by Venezuelan gangs. Imagine what he will do when the United States is actually at war with a real country, one that many Americans fear. Will he tolerate dissent in wartime? Woodrow Wilson locked up peace activists, including Eugene V. Debs. You think Trump won’t? He has been locking people up on flimsier excuses in peacetime. Even presidents not bent on dictatorship have taken measures in wartime that would otherwise be unthinkable.

Then there is the matter of terrorism. What if Iran is able to pull off a terrorist attack on U.S. soil in retaliation for an American strike? Or even just tries and fails? The courts will permit a president almost anything in the aftermath of an attack: Any restraints they’ve put on Trump will vanish. The administration may claim that anti-terrorism laws permit it to violate the rights of American citizens in the same way that it is currently violating the rights of the noncitizens being scooped off the streets by masked men. The attorney general has already threatened to use terrorism statutes to prosecute people who throw stones at Tesla dealerships. Imagine what she will do to anti-war protesters with the justification of a real terrorist threat.

Finally, there are the global implications. The United States is currently ruled by anti-liberal forces trying to overturn the Founders’ universalist liberal ideals and replace them with a white, Christian ethnoreligious national identity. American officials are actively supporting similar anti-liberal forces all around the world, including the current anti-liberal ethnoreligious government of Israel. Any success Trump claims in Iran, whatever its other consequences, will be a victory for the anti-liberal alliance and will further the interests of anti-liberalism across the globe. This is true even though the current regime in Iran is itself anti-liberal. Should the mullahs fall, Trump and Israel are likely to support a military strongman against any democratic forces that might emerge there. That has been Israel’s policy throughout the region, and even presidents who did not share Trump’s proclivity for dictators, such as Barack Obama, have acquiesced to Israel’s preferences. I’m not interested in using American military power to make the world safer for dictatorship.