"...if the NSA has spied, or is the NSA currently spying, on members of Congress or other American elected officials" It depends on your definitions of "has", "spied", "spying", "currently", "elected" and "members". So the answer is, "No".
I find it very depressing that semantics and definitions of fairly common-sense words are at the center of this particular set of weaseling.
Bill Clinton got away with the Monica comment about sex and so will the next bunch about something different.