Susan Shelley: Trump protects America with Venezuela deportations

Did the Trump administration violate the law by flying Venezuelan migrants out of the country as the ACLU battled in court to prevent it?

We’ll all find out together when this case gets to the U.S. Supreme Court. It’s just one of the legal fights President Donald Trump has picked in what seems to be an wide-ranging effort to force the court to recognize and clarify the full extent of a president’s constitutional powers.

The fate of the deportation case may turn on the legal meaning of “predatory incursion.” Under U.S. law...