I doubt it. Biden's leading so badly in nearly every poll there is and a recent poll had Biden up in Texas by one point. Economy's turned to shit and the buck stops with President. Not saying it was entirely his fault, but Biden's gaffes I don't think will be enough to take him down. People care about policy and the "return to normalcy" spiel by Biden apparently appeals to a lot of people.
In most polls I have seen Biden seemed to have great results ... I don't know if these polls are biased in the sense that Trump voters will abstain from telling who they are voting for because they are ashamed or something (like 2016)...
These elections will be interesting to watch
Apart from that, have you seen recent appearances of Biden these last few weeks ? He seems quite silent for someone with an election in the next months ...