Is Trump buried? I honestly don't think we can state this til at least mid September.
I honestly don't think anyone is stating that. Yankguy still thinks Trump will win.
What we can state is that the polling landscape is very bad for Trump; approval headed below 40%, +9 generic ballot lead for Congressional Democrats, and of course national polling that puts Biden's position in line with that of a popular incumbent.
And while yes, 2016 demonstrated the limits of national polls in predicting the electoral college winner, and state polling has more noise, there are good signs there for Biden too. He is leading in some polls in Georgia and Texas, for fucks sake.
The Trump Administration has been terrible and the polling reflects it. But we know Trump will play dirty, and we know Republicans in Congress will stand behind him no matter what it means for our Democracy. So yeah, there are unknowns.