Should AG Gonzales be impeached?

My colleague and FSR co-editor Frank Bowman has been calling for Congress to conclude its investigation of the US Attorney firings by impeaching AG Alberto Gonzales.  Writing from Slate, Frank now has this essay entitled “The Icing Is Iglesias: His firing is reason alone for Congress to impeach Gonzales.”  Here is how it begins:

Congress could and should impeach Alberto Gonzales.  One ground for doing so, as I have previously suggested, is the attorney general’s amnesiac prevarication in his testimony before the Senate and the House. But if Congress wants more, it need look no further than the firing of David Iglesias, former U.S. attorney in New Mexico.  The evidence uncovered in Gonzales’ Senate and House testimony demonstrates that he fired Iglesias not because of a policy disagreement or a management failure, but because Iglesias would not misuse the power of the Department of Justice in the service of the Republican Party.  To fire a U.S. attorney for refusing to abuse his power is the essence of an impeachable offense.