The polls look good, Bush's approval is in the dumper, the GOP seems in full dissarray, what could go wrong?

This.
From Tom Dispatch:

Like those famed sugar plums, visions of a Democratic House, and even Senate, are dancing in the heads of Party activists; while, for so many other Americans, simple hopes are rising for what the power of Congressional "oversight," the power to investigate, the power of a subpoena, might do to Bush administration dreams of endless domination. But sometimes -- even assuming all this came true -- a little dash of cold history in the face is a salutary thing. So let Greg Grandin, Latin American expert and author of the superb Empire's Workshop: Latin America, the United States, and the Rise of the New Imperialism, bring back to life the last time the Democrats found themselves in such a mood. Let him take you back to a previous, scandal-ridden era when another formidable President over-reached himself with off-the-books ventures of every sort.

Read on...