"Why is Mike Huckabee attacking Fred Thompson?" asks a new flier sent out in Iowa this week by the Thompson campaign. But, it is the former Tennessee Senator and GOP hopeful who has launched criticism of former Gov. Mike Huckabee, R-Ark., who leads Thompson in the most recent Iowa polls. The fliers, which were mailed to Iowa voters Tuesday, tie the former Arkansas governor to another former Arkansas governor -- former President Bill Clinton. The mailer features side-by-side profile pictures of both Huckabee and Bill Clinton, say the two "share a D lifetime rating for their tax and spend policies."...