I don’t see his support among blacks being anywhere near 46% - there have to be some errors in sampling, etc.
However, if it is even 16%, this election is OVER! He got about 11% in 2016, so if similar numbers vote (16.5 million, roughly 60% turnout), that means an extra 800,000 votes nationwide. But I also think that there are probably a lot of blacks who may not be able to pull the trigger on voting for any Republican (let alone Trump), but who either despise Biden for the ‘94 Crime Bill and his racial comments over the decades or feel utterly indifferent about him, and that says that there will be an even lower turnout. That will crush the Dems. So, instead of the Dems getting 89% of 16.5 million votes (14.685 million), they might get 84% of 16 million (13.44), a decrease of roughly 1 1/4 million votes nationwide. That’s gotta hurt, that’s going to swing at least one or two states to Trump.
RE: He got about 11% in 2016
According to NBC, Trump got 8% of black votes in 2016.
See here:
(EXCERPT)
Trump claimed 29 percent of the Hispanic vote on Tuesday compared to Romney’s 27 percent in 2012. With blacks, exit polls show Trump claimed 8 percent of the vote to the previous Republican nominee’s 6 percent.
This poll does not reflect the percentage of blacks expected to vote for Trump. It is a job approval number