The Franken campaign failed to do the most basic of research: vet their candidate. These tax problems could have been handled months ago. Instead, the Minnesota GOP has turn them into potent political bullets.
That's the problem with celebrity candidacies. The staff spends more time asking the candidate for autographs then they do asking him, "Oh, by the way, any skeletons in your closet?" Unfortunately for them, the RNSC probably has some staffers that have never thought Saturday Night Live was funny.