Yep and looking at the sheep entrails doesn't help much either. There are to many variables to consider. If the current POTUS gains a second term I would agree about the US retreating to further isolationism, however that also depends upon how long he keeps the two neocons Bolton and Pompeo on for. Both of them have returned the US to what it was in the first Bush Jnr term of imperial hubris and bullying, except this time it will backfire, because Trump has and is pushing away longstanding allies and friends, driving wedges between them and the US, to the point that some time in the future they'll turn their backs, politically, economically and militarily on the US, by circumventing the current US built and designed political, economic, security and governance systems. America Isn't as Powerful as It Thinks It Is. It not only empowers its rivals like China and the Russia, but also drives them closer together, and it drives other nations "demonised" by the US into their arms, building a willing anti American coalition that grows stronger politically, economically and militarily.Certainly agree that trying to crystal ball the future is enough of a challenge next month yet alone many decades ahead.
.... .
Regards S
Given the current political leadership and leadership outlook in the US, when the Chinese - Russian anti US Alliance strikes and probably succeeds, the nations in Asia will have to adjust to a new normal and it will not be a nice one, with interstate warfare and Chinese rules being enforced upon their whim whether non Chinese nations like it or not, as China and Russia asserts their hegemony over the Indo Pacific, Euro Asia regions and beyond.