Pulling troops out of South Korea is an important step in changing the conversation on American foreign policy, which is swamped in platitudes of promoting missionary enterprises abroad and finding new bogeymen to confront.
"The true principle of isolationism is that the government should be isolated and people who trade, interchange, and engage in voluntary travel, migration, and so forth should be allowed to peacefully do so."
The threat of “nuclear proliferation” remains one of the great catch-all reasons—the other being “humanitarian” intervention—given for why the US regime and its allies ought to be given unlimited power to invade foreign states and impose sanctions at any given time.
How did the federal government acquire this omnipotent power? Certainly not by constitutional amendment. It acquired it by converting the federal government after World War II from a limited-government republic to a national security state.
A divided America remains a wealthy America, and a postsecession America would be wealthy enough to retain a defensive military. Moreover, it's even cheaper to maintain an effective nuclear arsenal than to keep up a large conventional military.
The Biden administration has threatened to intervene in Burma to defend "democracy" which really just means putting back into power a woman who is known to support ethnic cleansing. But she said nice things about "democracy," so she'll get the US's nod.