It says "Biden" in the subject line.
It's a PPP poll sonny.
PPP over-polls GOP and under-polls Dems in TX/GA/AZ--if anything it has the same but less severe bias as Trafalgar there.
Contrary to popular opinion I think a decent number of those black undecideds will vote Trump or stay home. Same for what few white undecideds there are left. Since there's likely more social pressure in the black community to be anti-Trump, there have been more "undecideds" in the polls this cycle.
It's like you're completely ignoring that 2018 happened.