I've been in contact with the offices of PA Senators Casey and Specter, today, and over the past couple of weeks. Senator Specter's offices are well staffed, and usually I can get through to a human being in the Philadelphia office, but not this week. The citizens are really tying up the phones - good news. I finally got through to a staffer at the Erie office and left a personal message for Senator Specter.
I've also been in touch with my state-level representatives to urge them to re-assert 10th amendment rights. The staffers seemed unfamiliar with the issue, and I sent them information.
Maybe call the cloakrooms?
Senate:
202-224-6191 (Republican Cloakroom)
202-224-8601 (Republican Cloakroom recording)
202-225-4691 (Democratic Cloakroom)
202-224-8541 (Democratic Cloakroom recording)