When Clinton was President the Republican Congress issued more than 1000 subpoenas, and the Clinton administration complied with every single one.
Under the Republican Congress, President Bush was not issued even one subpoena. Not one. The Bush administration was allowed to get away with anything, anything it did. Impunity.
But then the Democrats took control of Congress and asked for some onformation. The Bush administration refused to provide it. So they issued a few subpoenas, and the Bush administration refused to comply. For months and months the Congress negotiated, and the Bush administration continued to stonewall and refuse to comply. Literally the definition of contempt.
So finally, finally the Congress has started to enforce the law: House finds White House officials in contempt of Congress,
The House voted Thursday to hold White House Chief of Staff Josh Bolten and former White House counsel Harriet Miers in contempt of Congress for refusing to testify before a panel investigating the firing of several United States attorneys.