the biggest problem is the climate. with trump winning, most/all of the climate policies will be revered irreparably damaging our planet bringing us to the brink of extinction. ofc it won't be all trump fault, current trends are gloomy enough yet those are the very last few years to actually do something..
The way I see it, he will continue with the transition whenever it benefits him/the country. Which means some programs might be canceled, especially if they go against such interests.