Benjamin Wittes: “The president should wait before popping the champagne corks over this and tweeting in triumph. Yes, in the best-case scenario for the president, Mueller is not proceeding further because he lacks the evidence to do so. But even this possibility contains multitudes: everything from what the president calls ‘NO COLLUSION!’ to evidence that falls just short of adequate to prove criminal conduct to a reasonable jury beyond a reasonable doubt—evidence that could still prove devastating if the conduct at issue becomes public.” “There are other possibilities as well.