WASHINGTON — President Trump had barely settled into the Oval Office back in January when he signed executive orders opening the door for construction of the controversial Dakota Access and Keystone XL pipelines.

He was just getting started.

In the following weeks, the Trump administration lifted a moratorium on coal leasing on federal land; blocked regulations on power-plant carbon emissions; overturned a ban on oil and gas drilling in the Arctic Ocean; delayed rules intended to prevent methane leaks from oil and gas wells; and announced plans for the U.S. to pull out of the Paris climate agreement.

Trump’s promise to repeal and replace the Affordable Care Act suffered a stunning defeat in Congress, and the prospects for his tax-reform pledge are far from certain.