The outcome is "an election in which a large number of people don't believe it was a fair contest". What matters is people's belief that the process has integr

The outcome is "an election in which a large number of people don't believe it was a fair contest". What matters is people's belief that the process has integrity. By its very nature, most vote fraud is hard to prove as due to the privacy protections in the system, it will boil down to people saying "I saw fraud happening with my eyes". And there are people in the US making that exact allegation right now under oath. I take no position on whether they're correct or not, merely observing that polls show the number of people who don't believe the election was run properly is dramatically higher now than it was before election day (amongst Republicans, Dems of course love it and are sure there's no fraud at all).