Trump signs executive order to keep families together at border, says 'zero-tolerance' prosecution policy will continue.
About 500 of the more than 2,300 children separated from their families at the border have been reunited since May, a senior Trump administration official says.
Migrant babies and young children are being held in special "tender age" shelters after being taken from their parents at the US-Mexico border.
Trump sees his immigration policy as a winner with voters ahead of midterm elections in spite of controversy over separating children and parents.
The U.S. is leaving the U.N. Human Rights Council, which Ambassador Nikki Haley calls an organization "not worthy of its name."