A ‘professional s—poster’ took Fox News’ Sean Hannity for a ride. Political and legal commentator Allison Gill, better known as “Mueller, She Wrote” was taken aback, writing:”Wow. He’s really going with this. Lol.” Her cynicism was based upon the top news item promoted by Hannity which proclaimed was grounds for a “mistrial.” Want more breaking political news? “And earlier tonight — this is huge, —Judge Merchan from the Trump trial sent a letter to lawyers on both sides of the case letting them know that before the verdict was announced that a Facebook user —I believe the day before the verd…