It did not drop, simply because he was elected. It wasn't a "trump got elected so, we are going to cut you some slack out of profit" kind of thing. That make no business sense, whatsoever.
In many cases fracking is fine. In other cases, fracking fluids have been forced into water wells, polluting them beyond ever being used again. I have also seen, situations where the injection of fracking fluids displaced natural gas above water table, bubbling into the water to the point, water out of the, not only could not be drank, but in fact, could burn coming out of the tap. It is also true, that in many places, such as some areas of Oklahoma, and some in Texas, where fracking is directly linked to sudden onslaught earthquakes, that have repeatedly damaged homes to the point of cracking plaster and drywall. When repaired, another round of quakes, then causes repeat of the damage, and this in a area that had not previously been subject to seismic activity. The guy on the report raised horses, but now, could no longer use his well, as it was no longer potable, even or use on horses. Currently he is bringing in water for his own use, but cannot continue to raise horses, as all water now has to transported in.
Like you, I also think fracking is a boon to energy production. But, I do realize, in some cases, it creats externalities of cost, and problems foisted on people and communities, the majority of those negatively affected, not participating in the profit attained. When the problem reported, document and linking to the fracking, oil companies got to great lengths to avoid or disprove the connection and with deeper pockets, than the affected ones. In the Texas case, the horse farmer who retired there, sinking his savings into the horse farm, he now has little choise but to move and cannot find buyer for farm, now without potable water, and being continually damaged by shifts in the earths. State governments do get involved, but have to walk a fine balancing line, not wanting to kill the golden goose, but having to deal with the inequity of the few negatively affected.