Elaborate. For me it sounds like the person who analysed that data found that a lot of BIDEN voters in Pennsylvania didn't vote for any local politicians (98,000-57,795). Is that what is meant, and backed by data? Or am I misreading something?
That is what the person concluded. But in the following Tweet, the same person, claiming to use the same statistical methods, concluded that negative numbers of TRUMP voters (in the tens of thousands) in three states didn't vote for any local politicians.
That means that whatever statistical methods he used are invalid, because it is not possible that negative numbers of voters voted for Trump only. Whatever calculation he performed on whatever data cannot be trusted if it yields impossible conclusions.