This Washington Post article on the Dems is a great life lesson. When you are focused on why you will not succeed or you forewarning excuses why you may not succeed–you will fail. A defeatist attitude will always defeat you.
The Democrats have still not found that core leader or leadership cadre that can make them believe they can win. They no longer believe in the vision of JFK and they do not have their Reagan. 2006 and 2008 will be interesting political cycles for this reason.