IN THE FINAL DAYS leading up to Maryland’s Democratic voters going to the polls on Tuesday to choose their U.S. Senate nominee, Rep. Donna Edwards has been barraged by ads and mailers from the Super PAC backing her opponent, Rep. Chris Van Hollen, called the Committee for Maryland’s Progress.

A television ad assails Edwards as “one of the least effective members of Congress,” contrasting her career with Van Hollen’s legislative record. It mentions no foreign policy issues, despite the dominant issue motivating one of the Super PAC’s largest funders.