Why do you think that Fox and the Republican's made Obama's birth certificate an issue when they could have used this instead?
Back in 2006, Fox News aired a segment on electronic voting machines.
That video can be viewed here.
HBO also aired a documentary called Hacking Democracy, on the same subject.
Why would the Republicans target an issue which is so hard to prove/disprove, like the birther theory, when they could have easily targeted the voting machines instead?
Also, 6 years later, why is this no longer an issue brought up by the media?