I thought so too, but I read somewhere that he will always have that 12% black following, so if you factor that in, his strongly approve among whites is less than 20%.
Also, for the first time his strongly approve is hit below 30%. His strongly disapprove has been in 40s for two days.
His numbers are usually always better over the weekend.
-10 this week. My prediction.
Maybe even -13 per your tagline... once the numbers start hitting from this week.