President Trump comes into office determined to discard huge swathes of his predecessor's legacy on day one, writes Mark Barteau. But he will struggle to undo Obama's clean energy regulations. It's not just that they are legally robust, it's also that energy markets in the US and the wider world have shifted firmly, and irreversibly, towards efficiency and renewables. Sorry, Mr Trump.
Trump has pledged to ditch the Paris Agreement, scrap Obama's clean power plan, get coal miners back to work, and 'make America great again' on the back of a huge expansion of fossil fuel production, writes Mark Barteau. But he will run into serious difficulties, not least states going their own renewable ways, cheap natural gas, and weak international demand for coal.