That is going to be a problem for him if he runs again and is asked about the 2020 election. People who followed and studied it will know what he's talking about, but that is not a majority of voters.
well it is pretty easy. The Pennsylvania Supreme Court literally ruling - multiple times - that election laws could be ignored, including mailing dates of ballots and signatures not having to match. Ballot harvesting in multiple states. Millions upon millions of ballots floating around without any chain of custody known / tracked is a simple argument that the election results could be in doubt even without any organized fraud given how close the results were in multiple states. The media knowingly covering up Biden scandals which if it had not been done would have likely changed the results of the election even with the ballot issues. The deck was indeed stacked against him.