We have received ample warning about the difficult times ahead, it should come as a surprise to no one when the US dollar goes over the cliff. The only thing we can do is to prepare for what lies ahead. Get out of the Stock Market, and get away from Wall Street. Mutual funds, annuities, IRAs, 401ks, and other paper assets will quickly become worthless, or will be seized by government order. Turn any financial assets into physical assets by purchasing gold, real estate, businesses, guns, or anything else you can physically touch. When the crises comes, the US government will be desperate for cash, bank accounts and other sorts of financial savings will be targeted for confiscation. Money will not be safe.
Trump can not doing anything, nor could Hillary or anyone else have done something if they'd won the election. This problem began decades ago, and no short term solution can stop the US dollar from getting abandoned by an international marketplace that's grown tired of Washington's incompetence.
https://www.lewrockwell.com/2017/11/doug-casey/doug-casey-on-the-destruction-of-the-dollar/