antiwar.com
Not because they're all that antiwar but because it provides an education on how Americans can pretend to be antiwar. They're really all prowar at times but it mostly depends on whether it's their party that's promoting the current war.
And then Justin Raimondo is a real hoot, wandering back and forth on supporting Trump and his stance toward Russia. I highly recommend reading Jason Ditz's writing at that site. But above all else, that site's main objective is in promoting libertarianism, which is always good for a chuckle or two!