Let's give it a couple of years. This Jan, Trump will complete 2 years in office. By Jan 2021, we'd know if he'd be around for another 4 years . We'd also get to know what happens in NK, Af Pak, Iran, Russia, China etc w.r.t the US and to the rest of the world. Right now, things are in a state of flux. By 2021, hopefully they'd be clearer & we'd see the contours of a long term future model prediction crystallising.
The way things are going Btw US and Iran are exactly the way thing went down a few years before the Second Gulf War. They are out for blood, Like literally