But, because he is Speaker of the House, he should be responsive to all Americans, in his capacity as Speaker, not just those in his district, The same should be true of the chairs of committees, in their capacities as Chair(s).
Nope, sorry. Just because he is in a position of leadership does not make him 'responsible' to all the citizens of the respective states. The positions of leadership were mainly instituted to keep some order in the place. Now have they been used to sway, block, or kill bills altogether? Perhaps. But that still does not make Hastert 'responsive' to anyone except the constituency that elected him