Some of those States were less than 10k difference in votes , and according to even Trump there was cheating in PA - why not in other places too?
I'm suprised the Dems would concede so fast ,even if it turns out to be a fair election, against a known grifter/subverter. Wouldnt be my strategy.
The Dems should be screaming blue murder about the way the GOP governors were doubling down on voter suppression after their same efforts in 2020 still did not hand Trump a win.
However, even if they took the 3 closest swing states instead of the GOP, that would still not be enough. So basically, it would all just be a lot of wasted effort, and they do not want to come off like Trump did last time, a sore loser trying to un-make a clear result.
Plus they still lost the popular vote, which is much harder to mess with because it does not depend on a few small differences in just a few states.
(Here's hoping the Republicans stop this BS where they oppose replacing the Electoral College with popular vote, because of the fear they would always lose to the Dems. Clearly that is not true.)
Harris quite consistently performed worse than Biden in the same places. Part of that is because Pennsylvania was basically Biden's home turf. Part of that is because of things this time being inflation and so on, whereas in 2020, the issue was COVID and how Trump & the GOP were completely bungling the response to it (probably cost the US an extra 500000 deaths). Part of that is the Biden government did a lot of things for the economy, but they are things that do not bear fruit right away, maybe not for 5 or 10 years, so in the here and now, it does not matter. Part of it is overt media manipulation and misinformation by billionaires, because the US system allows unlimited political corruption (thanks to a ruling by their equally corrupt Supreme Court).
And part of it is just a discontented anti-incumbent mood that is world-wide: Canada had a cluster of provincial elections, and it resulted in 1 losing (Cons out) and 2 near misses (NDP and SK Party); the UK government changed hands; Japan's "invincible" LDP has been reduced to a minority, Germany's coalition just fell apart, etc. etc. - it is just that sort of time in history, and even of the voters are misled about the causes of their suffering, they ARE suffering and ready to lash out in anger.