They'd do that anyway, even if Trump had Clinton prosecuted, and they'd do it even more passionately and energetically.
The mainstream media would simply ignore the Hillary story and focus on Trump, as they did during the campaign.
And maybe, just maybe, if President Trump urges AG Sessions to empanel a grand jury and re-open the investigation into Hillary Clinton right now, the facts concerning her criminal activity in the news might be enough to quell the Democrats and liberal media zealots agenda and get them to ease up on pushing fake news and begin covering news that matters to the forgotten men and women of this great country.
Not gonna happen. It would be seen as a diversion and a desperation move. And going back on one's word is rarely a winning political move.
P.S. American Thinker, get a new logo. Yours looks like -- well, you can guess what it looks like.
Hey, I do some of my best thinking in that position.