Many remain determined to reach the U.S. through more dangerous means, riding freight trains, hiring smugglers and dodging authorities.

How will Mexican leaders respond if, as expected, Trump pressures them to accept deportees from third countries? 'Mexico is in a really tough spot.'

Mexico refused to allow a plane carrying illegal migrants to land in the country on Thursday after President Trump dramatically beefed up security at the border and ordered mass raids and deportations since reclaiming the White House,