You are right about no fraud in US, I work with election people to make sure that the site stays up and displays election results and I know how hard we had to push to even make the most drastic improvements to the performance of the system. That is because they are so concerned that someone can challenge them on doing ANYTHING differently that in the last Presidential election even if technology has moved on... In fact in addition to official observers you can watch them process the ballots real time on streaming video... So yeah definitely no election fraud that could tip the scale in WA.
Lower level govt. workers in the United States will NEVER do any fraud. Especially election fraud with so many eyes on the ball!