Donald Trump signed a slew of executive orders after taking the oath as president Monday, looking to quickly implement his agenda, including declaring a national emergency on the U.S.-Mexico border, ordering construction on his border wall to resume and terminating diversity programs in federal agencies.

The orders will end diversity, equity and inclusion funding, crack down on border crossings, and ease regulations on oil and natural gas production.

Both legal and political leaders have previously poured cold water on Trump’s pledge, with former Republican House Speaker Paul Ryan saying: “You cannot end birthright citizenship with an executive order.” The “14th Amendment is pretty clear, and that would involve a very, very lengthy constitutional process,” he added.