I'll resolve this N/A because the odds of Biden rejoining the race are pretty remote, so it doesn't seem worth it to keep this open for another 3 months. @JonathanRay if you strongly disagree I can reopen the market.

@mods

Points for YES:

• Biden's 538 approval rating is around where Trump's was at this point of his presidency

• Americans are pessimistic about the economy.

Points for NO:

• 538's 2020 model had Biden at 90% towards the end.

• Biden will now be incumbent.

• Jan 6. happened after the election, potentially giving more voters a serious reason to dislike Trump.

Don't incumbents consistently underperform their last election? How is that a point for no?

@jacksonpolack I wouldn't say it's causal, but yes there is a relationship there. My bet would be that if we had N=10,000, we would find a very small (<1 point) incumbent advantage.

@jacksonpolack In the majority of cases in recent decades, incumbents have won when they run.

@BoltonBailey this has selection bias though - incumbents are people who have already proven they can win, this doesn't necessarily mean there's an advantage

In the majority of cases in recent decades, incumbents have won when they run.

Their margins are consistently lower is the point

/MartinRandall/trump-vs-biden-2024

Above market currently implies a major Trump advantage in a rematch, but has fewer bettors. Still, I think 30% is wishful thinking.