(Gregory Bull | The Associated Press) In this Monday, Jan. 7, 2019, file photo, floodlights from the U.S, illuminate multiple border walls, seen from Tijuana, Mexico. The migrant caravan that was seized upon by U.S. President Donald Trump in the run-up to the 2018 election has quietly dwindled to a few hundred people, with many of them having crossed into the U.S. or put down roots in Mexico.