It talks about Tesla, but I'm not really sure how much oil prices can really decline. I would be more worried about SolarCity and solar in general. Trump says he wants to expand coal, nat gas, etc.. and cheaper prices for those (and perhaps discontinuation of credits for renewable energy) would discourage new solar installations. What would be really sad is if this policy change causes bankruptcies in renewable energ…
Natural gas would have to be really cheap in order to beat spot prices for solar on sunny days, especially in the southwest. It's still good for peaker plants though. Coal, on the other hand, I don't see being profitable unless Congress starts taxing solar directly, since it still can't beat solar spot prices and it's categorically unprofitable to run coal plants as peakers.
I was looking up the numbers.. and was happy to see renewables cost being lower. But take a look at this 2015 report from the EIA: http://www.eia.gov/forecasts/archive/aeo15/pdf/electricity_g...
At the time at least, "clean coal" is more expensive than solar.. but if you eliminated the carbon capture requirement (ie: "conventional coal"), it significantly reduces the price, bringing it in under solar.
There is a 2016 version of this report.. but it gets rid of the conventional coal costs, because regulation prevents plants without carbon capture from being built. http://www.eia.gov/forecasts/aeo/pdf/electricity_generation....