In the long run, Trump changes nothing.

It's not like Trump can to make the learning curve work backwards and make the economics of solar power worse globally, the way it was done to nuclear power. Solar power can already compete with fossil fuel power on price, and it's getting cheaper still.

The economic case for fossil energy is only going to get worse over time. Even a string of anti-fossil-fuel administrations in the US could only delay the renewables for so long before the cost of propping up fossil fuels would become unbearable to the country's economy.