What did Robert Mueller know, and when did he know it?

This was among the questions that the Russiagate special counsel dodged at Wednesday’s Justice Department photo opportunity. More concretely, did Mueller promptly report his no-collusion conclusion, or did he cover it up for months, to enervate President Donald J. Trump and energize Democrats? Meanwhile, America tore itself in two.

Mueller’s 22-month-long inquiry was like chemotherapy — an invasive, all-consuming nightmare, though seemingly necessary to excise a malignancy. Serious suspicions existed that the Republican party’s standard-bearer conspired with the Kremlin to capture the White House.

MEDIA FLOODED WITH IMPEACHMENT STORIES, DESPITE TEPID BACKING ON CAPITOL HILL

The chemo eventually worked. It confirmed that there was no collusion. The Oval Office is not occupied by a Russian asset. If Dr. Mueller determined this in, say, mid-February and informed Attorney General William Barr on March 22, then Americans should applaud this fair timeline.

But what if Dr. Mueller last year deemed Team Trump cancer-free but, nonetheless, continued this exhausting, divisive, demoralizing chemotherapy — for at least eight extra months?

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