[GoldenState_Rose]

All those options sound awful. So what should USA do?

[TigerLikesRooster]

There is no cost-free solution to this problem.

If you absolutely want no shooting and no economic fallout, then scrap the non-proliferation in E. Asia. That is, allow all E. Asian states to go nuclear.

But I have a feeling that you don't like it either. Even more so for those in DC.