The impaneling of a grand jury to investigate Russian interference in the 2016 presidential election hammers home the imperative that the Trump Administration must not interfere with Robert Mueller’s investigation or that of the grand jury. Regardless of whether the President wants to continue to call Russian election interference “fake news,” he and his Administration must take this criminal investigation seriously and offer investigators their full cooperation.

The President must not follow through with his threats to fire Robert Mueller, but if he does Congress must hold him and members of his Administration accountable because no American, not even the President, is above the law.