The number of immigrant children in U.S. care who have still not been reunited with their families after being separated at the Mexican border has barely budged in the past week.

Since the White House announced its zero tolerance policy in early May, more than 2,300 children have been taken from their parents at the U.S.-Mexico border, resulting in a new influx of young children requiring government care.

In Canada, separating children from their parents is seen as a last resort as per the country's Immigration and Refugee Protection Act.