From the NY Times of March 26, 1992: "Any hope that the Clinton Administration would operate a Justice Department free of political taint -- or even the appearance of political taint -- grew dim yesterday when the White House confirmed that it would dismiss the U.S. Attorney investigating one of its chief Congressional allies." (Rostenkowski)
And by the way, when is Congress looking into cases where partisan politics played a role in false indictments, say, that of Majority Leader Tom DeLay?