What’s the point of having immigration laws if the government doesn’t enforce them?

Presumably, that was the thinking behind the Trump administration’s “zero tolerance” policy for prosecuting parents who enter the country illegally with their children. Yes, large majorities of Democrats and Republicans continue to view immigrants as a net positive for the country. But the president speaks for more Americans than his critics want to acknowledge when he expresses deep frustration with people who flout immigration laws.

Kirstjen...