That's one of the huge questions IMO.
I think DJT sees that things have to go in a certain order. First, the law enforcement and intelligence agencies have to be cleaned up. Then, they will be in a position to do mass arrests and trials. During these stages, U.S. energy policy needs to play to its strengths (which are still largely based on fossil fuels).
The swamp has been the group that has blocked the introduction of breakthrough energy technologies, breakthrough space propulsion, etc. Just see Eugene Mallove's case and how he chronicled the suppression of cold fusion.
However, once the swamp has been drained, it will be possible to introduce the new energy tech. Cold fusion (LENR / low-energy nuclear reactions) probably is probably the most well-developed of the technologies at this point, with thousands of peer-reviewed academic papers outlining how to do it. Not to mention all the LENR companies springing up like Brillouin, Brilliant Light Power, Leonardo Corpโฆ
Trump knows that breakthrough energy has to be introduced gradually to reduce shocks to the macro economy. So there's no problem with pushing coal for the time being. Everything must go according to schedule.