In the face of an unyielding Congress, President Barack Obama said Monday he will no longer wait for Republicans to act on immigration and will move on his own to make policy changes in what has been a top second-term priority of his presidency.

Obama said he will refocus immigration enforcement onto a Mexican border that has seen a tide of children crossing illegally from Central America. That means putting resources into deporting people who are the most recent border-crossers or individuals who pose a threat to public safety and national security.