Rich Lowry: A Trump Victory on the Border

Donald Trump's saber rattling may or may not deter Kim Jong Un, but it's had an effect south of the border.

In the first few months of this year, illegal border crossings have dropped precipitously. It is an early proof of concept that yes, it is possible to secure the border and a victory, even if a provisional and incomplete one, for President Trump's enforcement agenda.

Once you stripped away the impossibilities from Trump's rhetoric on immigration during the campaign -- there wasn't going to be a wall along the entire border paid for by Mexico, nor were there going to be mass deportations...