In this case who are 'they'?
Yup, just program the machines to pick the candidate of your choice and watch the votes tally up! And we thought the Chicago Way was corrupt.
Since early voting started, there have been credible reports that voting machines in Clark County, Nevada are automatically checking Harry Reid's name on the ballot.
Now there's absolutely no independently verified evidence of chicanery with the voting machines (yet), but it is worth noting that the voting machine technicians in Clark County are members of the Service Employees International Union. The SEIU spent $63 million in elections in 2008 and is planning on spending $44 million more this election cycle -- nearly all of that on Democrats.