FROM CNN's Jack Cafferty: What once seemed unthinkable might just become reality: Democrats are in jeopardy of losing the Massachusetts Senate seat held by the late Ted Kennedy for almost five decades. [cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2010/images/01/19/art.t.kennedy.jpg caption="Sen. Ted Kennedy (D-Mass.) lost his battle with cancer last year."] It took just about a week for the Democratic candidate … Continue reading How would Dems explain loss of Kennedy's Mass. Senate seat?