Doing it this close to November means they are desperate. If they found nothing it will backfire so I can only assume that they are certain that Democrats will lose and they want to destroy Trump while they can. Trump changed the game and opened the way for unapologetically America first, non-globalist politicians and ideas to become main stream. Not so long ago a threat of being called an ist or phobe by CNN or NYT would send anyone cowering, now you see more and more politicians defying the narrative. They tried to destroy him with the russia hoax, impeachments and now with the J6 trials. Nothing stuck. If anything Trump seems stronger now.