I was in IT and people don’t realize just how much you have access to if you manage the infrastructure or even have full access which you need to do your job. It is entirely possible these guys had full access to every Congressional e-mail and home directories ( their H drive in many cases).
A huge possibility of security breaches.
Like installing some kind of program into the computers and Blackberries the clan procured for Congress so as to have EVERY KEYSTROKE transmitted to some out of network device?
Plus personal info. "I need to check my bank account/credit score/home email/whatever online. Can you give me a hand?" People would be amazed at the number of personal docs (CC bills, bank statements, W2's, etc) that are just left lying around. Along with passwords on computer monitors, pinned to corkboards, or (my favorite) hidden under keyboards...so that they're totally safe.
Heck, most info is available for the asking. "I'm from the help desk and we're installing a new software package. Can you leave me your password? We'll just take care of the install while you're out to lunch....."
That's what's easy. Never mind if Wasserman and her minions were up to something nefarious.