The argument that they are trying to make is that it's a candidate, and not an individual voter, who is harmed by disenfranchisement, or the potential for it, and only the candidate can provide any substantive evidence of that harm, whereas the voter cannot be said to have been materially harmed in any way that this court, whose jurisdiction in this suit is also called into question, would be able to provide injunctive relief to the voter.
The call for Hillary to get involved would be nice, but it's not going to happen.
Alan Keyes says he is still running for president. Maybe he would join Berg's lawsuit. :)