The great thing is that it's all legal. The executive has prosecutorial discretion, that's very well established law.
So...
How's that petard?
NewRepublic Wrote:The president’s broad prosecutorial discretion has been repeatedly recognized by the courts. In 2013, Judge Brett Kavanaugh of the D.C. Circuit, appointed by George W. Bush, offered a strong defense: “The president may decline to prosecute certain violators of federal law just as the president may pardon certain violators of federal law,” Judge Kavanaugh wrote. “The president may decline to prosecute or may pardon because of the president’s own constitutional concerns about a law or because of policy objections to the law, among other reasons.”
So...

How's that petard?
"How is it that a lame man does not annoy us while a lame mind does? Because a lame man recognizes that we are walking straight, while a lame mind says that it is we who are limping." - Pascal