On a spring day at a speedway in North Carolina, John McCain posed with his wife, Cindy, and racing star Dale Earnhardt Jr., highlighting the couple's political and business interests in a single snapshot. McCain served as honorary starter of the NASCAR race that weekend in Charlotte, N.C. Earnhardt drove the Budweiser car, painted military camouflage, rather than its trademark red, to honor the troops. Budweiser, then NASCAR's official beer, is brewed by Anheuser-Busch Cos. Inc., whose products have made Cindy McCain and her family a fortune. The brewer sold toy replicas of its race car to aid the Special...