Can Mueller Prosecute Cover-Up Before Proving Crime?

Vanity Fair: “Of all the avenues in the sprawling Russia investigation, Robert Mueller appears to have advanced the furthest toward assembling an argument that Donald Trump obstructed justice. And in the coming weeks, the special counsel’s team will interview a former top White House aide who could verify key pieces of the puzzle. Then Mueller would confront the thorniest question yet: does he prosecute the cover-up or hold out to try to nail possible underlying crimes?”