lots of action on poly

Can someone explain why they think he would also resign vs just not seeking re-election (e.g. like LBJ)

because the same reasons for his dropping out of the election (cognitive decline mostly) would also be strong reasons for why a president should step down from office.

there’s a slight chance it could help Kamala get votes too if she is running as the sitting president.

I think people figure it would boost Kamala's chances if she is the president while running. An incumbency advantage even if it's small. Or at least that's the reasoning I've heard!

If Joe Biden resigns, that would put Kamala Harris in a position to potentially have the second longest presidency in US history:
/jks/will-another-us-president-hold-offi

Kamala Harris Overtakes Biden as Favorite Democratic Candidate in Betting Markets

Odds of resigning the presidency feel extremely slim. I think this is probably still substantially high. Odds of dropping out is another thing but together it just doesn't matter if he's not gonna resign.

yeah if he does resign it's likely to be much later, too.