That's what the Independent Insitute's Anthony Gregory asks. His answer:
There is little reason for optimism that the Democrats will…deliver us from the evil of the growing police state of warrantless searches, indefinite detentions, sweeping surveillance, and other attacks on civil liberties.
For one thing, Democrats have supported the worst of Bush's policies. Only one Democrat in the Senate, Russ Feingold, opposed the Patriot Act when it was first proposed. Just this year, Democratic members of the House overwhelmingly, and Democratic Senators unanimously, approved the Defense Authorization Act for 2007, which contains frightening modifications of the Insurrection Act and new exceptions to Posse Comitatus, empowering the president to summon the National Guard, without gubernatorial authority, and to enforce martial law during "emergencies" ranging from natural disasters to health crises. More than 25 percent of Senate Democrats even voted for the Military Commissions Act, marking the first time since the Civil War that the federal government suspended Habeas Corpus.
Whole thing, including donkey-party horror stories from the Wilson administration up through the Clinton administration, here.