so trump is pulling 42 percent of republicans, while 58 percent want someone else. seems like a bad sign in the general
What's going to save Biden is that instead of the general election being a referendum in the sitting President like normal elections, the election is going to be a referendum on Trump.
Once Trump is officially the Republican nominee and possibly a convicted felon, he will be in the faces of people much more often than he is now. He'll be saying crazy shyt, reporting will continue to come out about his demagogue plans if he wins re-election, bragging about appointing 3 Supreme Court judges who ended Roe vs Wade will hurt him with women, and it will become more obvious to voters that he is running for President to stay out of jail. People will be reminded why they don't want him back.
This is not to say that Biden doesn't have anything to worry about because he does, but I think the weight/toxicity of Trump overrides the worries/situations that could hurt Biden.
This is why the Republicans are idiots for not convicting Trump in the 2nd Impeachment and banning him from running for office again. If they did that, they would have a guaranteed shot at winning the White House with DeSantis in 2024 and a good shot with Haley. But, they are scared of Trump voters and scared they would hurt Republicans over the long haul.