Migrant detention

Kevin McCarthy's trip comes amid a jump in the number of migrants showing up at the border, especially unaccompanied children. Democrats say the GOP lawmakers' visit was a political stunt.

Many are fleeing crime and poverty in Central America and rushing to the U.S.-Mexico border. Homeland Security Secretary Alejandro Mayorkas this week called the situation a "stressful challenge."

By Adriana Gomez Licon / The Associated PressThe nation's largest facility for migrant children has released hundreds of teens to relatives in recent…