The first television attack ad in Minnesota's U.S. Senate race has prompted candidates on both sides to call for it to be taken off the air. A group called Citizens Opposed to Racism and Discrimination is running an ad calling DFL Senator Paul Wellstone a liar and a millionaire. The Wellstone campaign says the ad is just the latest in a series of attack ads run by outside interest groups. Minnesota Public Radio's Laura McCallum asked an analyst to review the latest ads...