King Coal made the industrial revolution, but now it's in its dotage.
In many places, renewable power from solar and wind is already cheaper than coal. This led to a problem in Australia when an inter-grid connection went down and a big chunk of South Australia found itself without backup for those times when the Sun doesn't shine. Enter Elon Musk with an offer the down under couldn't refuse - 100 MegaWatthours* of energy storage in 100 days or it was free. At a bargain $250 kWhr.
I don't think Trump or anyone can save coal now. I would not be surprised if grid storage increases by a factor of 100 in the next five years.
Phun Phacts: 1 Whr is 3600 Joules, so 100 MWhr is 3.6 x 10^11 J, or roughly the energy in 15 metric tons of coal, which doesn't sound like a whole lot. A big coal burning power plant costs $1 billion plus and can produce a GW (1000 MW) of electricity. Musk's 100 MWhr array would only store about six minutes worth of the output of such a plant. At several points during the crisis, though, prices reached the legal maximum of $14,000 per kWhr. At prices like that, your 100 MWhr grid storage can pay for itself rather quickly.