President Trump has successfully built an immigration wall that has proven impenetrable for tens of thousands of migrants — it’s just not the physical one he and others obsess about.

What’s happening: The number of attempted border crossings is falling, and denial rates are climbing. The very nations most migrants flee from are now the nations where asylum seekers are being sent.

The big picture: Over the last few months, the Trump administration has begun implementing its asylum agreements with Central American nations, which could help keep asylum seekers out of the U.S…

The bottom line: The number of people crossing the border fell for the seventh straight month in December — the first time that number of border crossings has fallen from November to December since 2012, according to new Customs and Border Protection (CBP) data.