The DEMs are digging furiously now, and more of their ranks are climbing in the hole. Allow them time to finish that work before commencement of backfill.
They'll bitch that Trump should have fired Mueller because Mueller was incompetent. Then they will demand a new appointment / do-over. Trump will be accused of obstruction for not firing Mueller.
FakeNews will get the script later. They'll gas it up alright.
The fact that he won;t answer gives justification to find a resource that will investigate those points, and get answers to them. This is especially true on the Mifsud and genesis of the hoax questions.