We know a lot of details about King County cheating.
There was a guy on the Internet who dissected a stolen governor’s race and how it was done (Gregoire stole it from Rossi).
The Democrats “registered” homeless people using the King County Courthouse as their “address”. They can use the old lists—they are not checking the databases anyway. The homeless person could have died five years ago and they are still registered.
Then on election day Democratic operatives in the Courthouse “cast” the ballots for the homeless people.
This is not a “magical” operation—there are physical limits—I think it was in the 10,000 “vote” range back then, so I am guessing 50,000 is roughly what we are looking at now.