Tennessee Attorney General Robert E. Cooper, Jr., has issued an opinion saying that the voter ID bill being debated in the state violates the Tennessee and United States Constitution because it is a poll tax.  People who do not a photo identification card in Tennessee could obtain one under the bill, but would presumably have to pay the cost of the photo ID.  The bill also allows anyone who cannot afford it could execute an affidavit and still cast a ballot.  The opinion concludes that the photo id bill is otherwise constitutional if the cost of the photo id is removed.  Democrats had requested the opinion.  Cooper is also a Democrat.