Political Wire: Clinton Says She's Most Electable

So Hillary thinks she's the most electable of the 2008 Democratic aspirants. What exactly does that mean? John Kerry got that label in 2004, and look where it got him. What makes a candidate "electable"? Isn't it having an agenda that addresses people's concerns and conveys the message that this candidate can get things done that will make the country better? Being "electable" is something that is earned on the campaign trail, not something bestowed by opposing strategists.