What is the bigger threat to Biden's reelection?

[TheHegemonist]

I think what hurts Biden more than the protests is the general feeling that the world is a less safe place than when he first took office; caused by Ukraine and Gaza and other conflicts (the biggest singular hit to his popularity was the botched Afghanistan withdrawal).

His age also feeds into this - if people think the world is unsafe, they may be hesitant to vote for someone that they believe can't physically/mentally handle the pressures of office or make sound decisions.

That being said, if something major happens at the convention, that could really hurt him. The conventions set the tone for the elections a lot of the time (many candidates have gotten a "convention bump" as low-info voters give them a first or new look), and if there is rioting or something else bad it could trip up his campaign out of the gate.