Prosecutorial discretion and deferred action no doubt mean that certain segments of immigrants are not being eyed for deportation. But David Martin, an international law professor at the University of Virginia School of Law, argued that doesn’t add up to a reluctance to enforce the law. He said it’s "choosing different things to enforce. There’s been an effort since very early to be more serious and more systematic about the priorities," Martin said. "In my view that’s a perfectly appropriately way to operate a law enforcement agency. I see it as more sen...