Several immigration hearings are being held far from the border with Mexico , in districts where Republican lawmakers are engaged in competitive races for the House , including Evansville , Ind . ; Concord , N.H. ; and Glens Falls , N.Y . Hearings are also being held in Dubuque , Iowa , where Republicans are fighting to hold on to the seat being vacated by Representative Jim Nussle , and in Hamilton , Mont . , where Senator Conrad Burns faces a tough challenge .