Key point is to express your request CLEARLY, do not put it too long. As long as it is understandable, it is fine. I believe, no officers will judge whether he/she will help us, based on whether our writing is beautiful.
The ones to senator or congressman are very similar. Again, I recommend to drop by their offices, which should be better than communicating by e-mail or letter for the first time.
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Dear Ms. Laura Bush,
I am writing this E-mail to seek for your help on my pending green card petition (I-485 adjustment of status).
My I-485 form was sent to USCIS on *****. It has been pending at NSC for over 1 year and 7 months. It already exceeds the normal processing time (according to USCIS website, USCIS is processing the cases ted on June, 2006). I was also informed in last November that my FBI name check, fingerprints check, and biometrics have been completed. Therefore, everything is ready now, and there should be no reason that the case is still pending.
Here is my information:
My I-485 case number is ****
My I-140 case number is ****
Alien number: ****
My name is ****
Date of Birth: ****
Please let me know if more information is needed! Your help on this matter would be highly appreciated!
Best regards,
****