It's no secret that our current US administration is envious of China. So in no small part they probably want to model the US Dollar after the Renminbi. Drop the value internationally to incentivize American exports, and manipulate the hell out of it. (Hence why they have dropped inflation as a political issue - some in the administration are essentially rooting for inflation to get much, much worse).

It should go without saying that this would be shortsighted - China made it work because they were able to take advantage of a strong international market denominated in USD. The US cannot destroy our own common market and currency and expect to take advantage of it.

Furthermore, we know what a de-dollarized world looks like - imperialism. If you need to secure oil/mineral/food for your economy but you need expensive foreign currencies to acquire it, it suddenly becomes much more economically appealing to take the resources.