Election officials need to keep telling voters that many races may not be decided on election night. This does not mean fraud is happening. This year there are simply too many ballots to be counted in one day. Here in Washington ballots can be opened and signatures matched as they come in, although counting can’t begin until election day. Some states don’t allow ballots to be opened until election day, and three do not allow any counting to begin until the polls close.
Oh, and here you can even register to vote and then vote on election day at county election offices.