A small migrant caravan has set out from southern Mexico, heading north, but is unlikely to reach the U.S. border after authorities broke up two other small caravans headed to the United States over the weekend.

The number of migrants caught illegally crossing the U.S. borders with Mexico and Canada fell in November, a senior U.S. border official told Reuters, part of a months-long trend that undercuts President-elect Donald Trump's claim illegal immigration is out of control.

Incoming Border Czar Tom Homan weighs in President-elect Trump's tariff threats against Mexico and Canada, the showdown with sanctuary cities and the humanitarian crisis on the border.