Well I hate to break it to you, but 2 months is not long for Cairo. In fact, they usually take much longer to complete administrative processing and administrative review -- at least 3 months, and sometimes (unfortunately) a LOT more. We have one member here who has been waiting since the interview in MARCH, and they're just now about to issue the visa, 9 months later.
Of course you can always contact your Senator or Congressional Rep. You would need to let them know all the specifics of the case -- names, case #, which Consulate, the date the case was sent, etc. And tell them why you think it's taking too long. It's possible they can help, but be aware that they might not -- the security checks are all out of their hands.
But as I said before, 2 months isn't even close to the average for Cairo. Your family will probably just have to grit their teeth and be patient.
Sorry -- I'm sure this isn't what you wanted to hear. But insha'allah your relatives will eventually come through successfully. Wishing you all the best for a speedy conclusion.

-MK