Here’s how U.S. Congress could stop President Trump’s national emergency

Fortunately, there is still a legal mechanism in place, although technically it’s never been implemented before. It’s scary to think about, but U.S. President Donald Trump has far-flung powers to declare a national emergency for almost anything he wants. (The Atlantic has some chilling examples if you feel like losing sleep.) That’s thanks, in part, to the National Emergencies Act of 1976, which gives the U.S. president the ability to bypass Congress in a broad array of emergency situation...