sounds like a closet RAT in her office was out to embarass her. Some housecleaning needs to be done.
OR the person who received the letter doctored it up A La Dan Rather. What makes me suspicious is how would the letter get out to the media. An ordinary person would have called the Congresswoman's office to get an explanation. Once they got it and an apology, that would be the end of it. Instead they called in the media, which makes me go hmm.
Should have included you to the comment in post #6...
Not necessarily in her office. It's possible that Congress has a mailing service where the letters are created on a computer and submitted out to a printing site and zip sorted. They have a system like this in the CA legislature tough not everyone chooses to use it. At any rate some RAT in the mailing service location could have done that.