>> no. >> [ yelling ]. >> we were talking about separation of powers. have you ever written any decisions where you used the 10th amendment? i'm talking about division of powers between federal and states. >> most that come to the d.c. circuit are at the national level therefore involving between the executive, judicial branches. of course federalism is a critical part of our constitutional structure as well. the gene juenius of our system f federalist 39 described that we have both a national and federal government simultaneously. and the house of representatives really represents in some ways the national part, proportional