Yes, and like all crimes, I assume it happens here and everywhere. It’s obviously nothing new. When and where it changes election results is the big worry, and that I have no handle on.
I’ve read that the President has done some things to stymie the Dems though. And I look upon his reelection as Job 1.
Elections can go one way or another with one vote. Any state with mail in voting (not absentee type) is a breeding ground for fraud. My state has mail in for years, can’t remember how long. The old joke is you never the total from Multonah County until all the rest of the state is counted, as they need to see how many more votes they need to push the Dems over the top.