For some people, disapprove means strongly disapprove.
They are simply polite.
The core group of minority votes are keeping him from hitting truly low, low numbers.
But they are going to be so disillusioned in the fall that they will not help.
They know this. We know this.
Yes, he may be at a level that he can drop no lower because of enthusiastic “core” backers still expecting the “check in the mail.”