@Mark 85
Your comment makes no sense whatsoever. What exactly is this mysterious "self-interest" that is impelling members of congress to investigate the OPM data breach?
They are in exactly the same boat as millions of other government employees.
The data has already been stolen. Do you understand that? So how members of congress would find themselves in a position different than any other government employee in regard to this is a riddle. You need to try to learn how the world works.
Be certain that the amount of publicly-available information on members of congress far exceeds anything that the OPM had in its files. And since the OPM data was self-submitted, it doesn't include anything that anyone would really want to hide. Any foreign power - or local political opponent, for that matter - would have the incentive and the ability to easily gather more data, and more sensitive data, and potentially far more damaging data, than what members of congress voluntarily submit to the OPM. They live with that every day.
So the situation of member of congress, consequential to the OPM breach, remains... completely unchanged.
It's all the other government employees that find themselves in a, shall we say, new situation, with their data being available to and pored over by heaven only knows whom, and for what purpose. Member of congress are probably very accustomed to living with threats like this; your average government employee, probably not.
Even leaving aside the data that is publicly available, via the courts, or credit bureaus, or similar, for both congressmen and other government employees, the amount of illegally-obtained data seems to be so vast that one has to wonder how much of effect the OPM breach actually had on them.
Members of congress have to expect to be the subjects of inquiry and investigation, both legal and covert, from all sorts of quarters and entities - foreign, local, political, journalistic, etc etc etc, and would probably be grateful if the stolen OPM data was the worst threat that they had to contend with. But it's not. And members of congress probably have less to worry about the OPM data breach than almost anyone else.
Learn to think about things.