It's been over 200 days since my RFE after N400 interview and I've still not got any updates from USCIS. The officer is literally delaying the process, without even updating the online case status to RFE response review from RFE. I've initiated a Congressional inquiry during first week of August and it's been more than 40 days since my Congresswoman's office started their inquiry process and we still don't have any updates. Any idea of how long will USCIS takes to respond to Congressional inquiry? What should be my next step, if there is no proper response from USCIS to Congressional inquiry?