I'd just point out how amateur Trump's handlers seem to be.
If you want to use Flowers for maximum impact, you don't trial balloon her in the media. You simply give her a seat in the front row without ever telling anyone she will be there. That way, when the media and Hillary realize it, it's too late and she's already on TV, Hillary is already knocked off her game and you win.
Which of course is exactly why they didn't. All they did is throw red meat to the faithful, take it away, and solidify the idea that their guy actually did something meaningful when in fact, he helped his 'opposition'.