Donald Trump promised the American people he would build a “big, beautiful wall” along the US-Mexico border. At campaign rallies, it became a call and response. In a lot of ways, it became a joke. To some, it became a taunt at high school basketball games, a way to make clear some kinds of people aren't welcome here. Most of all, the wall was easily the most identifiable campaign promise of any candidate in the 2016 election cycle — maybe of any candidate in a generation.
Now that Trump is president, that promise is coming due.