No intro.
The Democrats seem to believe that they have the 2008 presidential election all locked up. Now that mindset is understandable to a certain extent as the Republican candidates really don't have a strong front runner and the entire Republican party is in disarray because they have the stigma of being associated with a unpopular encumbant, an unpopular war and a failed administration.
Nevertheless, back when the 2004 presidential race had begun, the situation in Iraq was already in serious decline, it was clear that they weren't going to find any WMDs and on top of that gas prices were high. Yet Kerry still lost the 2004 election despite the fact that Bush was clearly beatable. In 2006 during the congressional election race, the situation in Iraq was in an even steeper decline, the embarrassment/scandal of the slow Katrina response had occurred, gas prices were still high and yet the Dems won the Senate by only a slim margin. And many of the Senate and house races that they did win were extremely close.
The Democratic party needs a vision of a better future for America to run as their platform as opposed to just hoping that things under Bush continue to remain so bad that people will just vote Democrat out of pure frustration. Because even if the Democrats do win they'll never hang on to power for very long with that strategy. The new liberal/Democratic revolution will only be as strong as their next president. Remember even despite Watergate, after four years of Jimmy Carter, Americans overwhelminingly voted Republican again in 1980, and even more overwhelmingly in 1984.