For President Trump, tearing up trade agreements may be easier said than done.

During the campaign, Donald Trump signaled that he would make major changes to US trade policy as president, including renegotiating major existing agreements like NAFTA. Ahead of Trump’s inauguration, Michelle Egan writes that Congress has given the presidency major powers to negotiate trade agreements, meaning that President Trump will be able to change or walk away from existing agreements with relative ease. Though he may face little opposition at home, Trump’s efforts may spark disputes from trade partner countries, disrupt supply chains, and exacerbate inter-agency rivalries at home.