The stations near Federal buildings are slow chargers, they don't matter for road trips. Most fast chargers are commercial, and are not susceptible to Trump's meddling.
You can use Plugshare to look up stations near you. Set the filter to 100kW or faster charging.
The Dakotas are fine. They're better covered than Saskatchewan and we visited there in a Tesla. Superchargers on the highway, the friends and family we visited all had welders so had high amperage 240V, and campgrounds also let us charge overnight.
Regardless not enough charging stations exist for me, if I’m going to buy a car I want to be able to drive it cross country.