They are taking it as an affirmation that Americans are still democratic at heart and even though there are 2020 election deniers, that movement is losing steam. There might be some truth in this in at least some places but I am not sure it was the only factor in many of the swing states and regions.
I'm guessing that the reasons that Democrats won as many races as they did has more to do with the liberalizing of America and the fact that Americans vote for those they think will help them pay their bills due to the high inflation. (Interestingly they vote for the people who helped cause the inflation in the first place.)
A democracy cannot exist as a permanent form of government. It can only exist until the majority discovers it can vote itself largess out of the public treasury. After that, the majority always votes for the candidate promising the most benefits with the result the democracy collapses because of the loose fiscal policy ensuing, always to be followed by a dictatorship, then a monarchy.- Alexander Fraser Tytler or Alexis de Tocqueville
Thoughts?