WASHINGTON - Sen. Mike DeWine (news, bio, voting record) is running under a new banner as he seeks re-election in a difficult environment for Republicans. "Independent fighter for Ohio families" reads the tag line on the first television commercial of his campaign. The ad concerns legislation that requires children's drugs be tested for safety and effectiveness, and spokesman Brian Seitchik says it is designed to show DeWine "getting things done" through bipartisan cooperation. Despite the emphasis on independence, Republican National Committee Chairman Ken Mehlman rebuffs any suggestion that the second-term senator is trying to keep his political distance from President...