I'm inclined to think this was written as a prop....after the fact that "scrutiny" was already well under way.
In other words, this "request" infers that no such scrutiny has occurred YET.
It's a type of "scrubbing" the record.
Interesting...Either they were trying to cover up what was going on already, or they didn't see enough action from the IRS and were pushing for more.
Needless to say none of the Senators seem to have raised any issues with Obama's Organizing for America, or any other liberal group.