here is the link to find your local congressman: https://writerep.house.gov/writerep/welcome.shtml. You need select your state and fill your zip code. then you will go to the web of your congressman. In the web, you can send message or get the phone No to call them. My congressman office need me to fill a document so that they can represent me to inquiry immigrate office. I provided them Case No, A Number, birthday, SSN, PD and cut date for China. Generally you can get the case status very quickly from them. Good luck!
