This is what I have been saying to people who can't understand what happened yesterday.
It's the most simple concise response: why did something that has never happened in the history of our elections suddenly happen all at once in the states that ended up determining the outcome?
You can not and will not find an appropriate response, because even Biden supporters in their gut know the answer.
It's like taking your final exam in college, and when its time to turn in your paper, the student next to you got an extra fifteen minutes while everyone else were told to leave the room.
When you get your grades, you get 100% correct and that student got 125% correct.