NEW : In her letter Friday , Ruemmler called the subpoena `` unprecedented and unnecessary . '' House Democrats says the probe is fair , but the GOP-led subpoena is not . White House counsel says the subpoena , as written , is unacceptable . Comment: House subcommittee 's chairman says Obama administration has n't cooperated .
NEW : House Democrats says the probe is fair , but the GOP-led subpoena is not . White House counsel says the subpoena , as written , is unacceptable . Comment: House subcommittee 's chairman says Obama administration has n't cooperated .