[Ed. – Rivkin and Casey are right to say that the answer to what is essentially a political and not a criminal problem should be political — not criminal.]
Mr. Mueller’s investigation has already morphed into an open-ended inquiry. It is examining issues—like Donald Trump’s private business transactions—that are far removed from the Russian question. It also has expanded its focus beyond the original question of collusion with the Russians to whether anyone involved in the Russia investigation has committed some related offense. That is evident from investigators’ efforts to interview White House aides who were not involved in the 2016 campaign, and from leaks suggesting that Mr. Trump’s firing of FBI Director James Comey might have “obstructed” justice.
That claim is frivolous, and it damages America’s constitutional fabric even to consider it. A president cannot obstruct justice through the exercise of his constitutional and discretionary authority over executive-branch officials like Mr. Comey. …
Mr. Trump can end this madness by immediately issuing a blanket presidential pardon to anyone involved in supposed collusion with Russia or Russians during the 2016 presidential campaign, to anyone involved with Russian acquisition of an American uranium company during the Obama administration, and to anyone for any offense that has been investigated by Mr. Mueller’s office.