President Obama reportedly called Donald Trump to congratulate him, a fine gesture in the direction of unity.  But if President Obama issues a blanket pardon for any Hillary Clinton crimes, as is his prerogative, that unity will be shattered, and his legacy will be damaged, as an enabler of crime.

The revelations about the evident sale of government favors go to the heart of political legitimacy and national security.  The doubts raised must be resolved by a thorough investigation that includes the use of grand juries.  The reputation of the FBI, which we need to protect us from many serious threats, has been sullied and must be restored.

The Department of Justice is another basic institution that has lost vital legitimacy in the eyes of many and can begin to repair the damage only through careful and thorough consideration of the evidence and prosecution if warranted.

The election of Donald Trump is a message that the American people are appalled and want a housecleaning.  Frustrate that at your peril, Mr. President.