Snoofy,
"You can not prove with absolute certainty that zero irregularities or fraud occurred in any Presidential election."
You are absolutely correct.
However, for 2020 you have to step back and look at the bigger picture.
Mail-in ballots being used on such a massive scale during COVID greatly amplified the potential for problems.
Some concerns were already known from states that had experience with large-scale mail-in voting, but now everything was compounded nationwide.
And there were also new procedures and processes being implemented in real time that had never been tested on this scale before.
All elections have irregularities.
Absentee ballots have always been controversial because of late arrivals and verification issues can create disputes. Historically, though, it usually was not enough to seriously question the outcome of the election.
2020 was very different to many people because the scale, circumstances and uncertainty were unlike anything seen before.
That is why many Trump voters questioned the results at the time even if they cannot prove Trump actually won or any fraud.
My opinion is this was exactly what led to the actual Jan 6 break-in.
We need public confidence in our elections.
Laura,
I believe Trump will go down in history as one of the most significant Presidents America has ever had.
But many liberals became so consumed with hating him, they never stopped, or even tried, to understand why millions of Americans supported him in the first place.