Rep. Henry Waxman (D-CA) has had enough of the great stonewaller himself, EPA Administrator Stephen Johnson.
In a letter today to Johnson, Waxman threatens to hold Johnson in contempt for failing to comply with congressional subpoenas requesting information on two recent controversial decisions by Johnson that overruled EPA's professional staff: his refusal to grant California a waiver to regulate greenhouse gas emissions from vehicles and his refusal to fully raise ozone standards.
Waxman, the chair of the House Committee on Oversight and Government Reform, sent a similar letter threatening contempt to White House official Susan Dudley, in the Office of Management and Budget, for the White House's refusal to comply with a related subpoena.
You have neither complied with these subpoenas by their returnable date nor asserted any privilege to justify withholding documents from the Committee. In light of your actions, I am writing to inform you that the Committee will meet on June 20 to consider a resolution citing you for contempt of Congress. I strongly urge you to comply with the duly issued subpoenas.
The full text of the letters are here (pdf) and here (pdf).