Thanks a lot for your quick reply! Lets suppose that by the time I become eligible for N400 (March 2013), my I-751 case is still pending; but right after my N400 package sent out, I receive an RFE for the I-751 case. What shall I do then?
-Respond the RFE for I-751.
Does this impact the N400 approval process?
-The N-400 will not be approved unless your I-751 is approved first.
Another scenario could be that i receive an RFE between now and March 2013 for the I-751 case, do you suggest I respond to USCIS with additional documentations and wait for a final result before the N400 process, or proceed with N400 anyway even before a final I-751 decision is reached?