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.

Recently released disclosures reveal that $100,000 — a sixth of what the Super PAC has raised —comes from a single source: a donation by pro-Israel billionaire Haim Saban.

A “One-Issue Guy”

Saban, who made his fortune in the media and entertainment industry, has spent millions of dollars influencing the foreign policy establishment, including by sponsoring the Brookings Institution’s Saban Center for Middle East Policy and funding the American Israel Public Affairs Committee (AIPAC). He is also one of the largest donors to Hillary Clinton’s Super PACs. In a 2010 interview with the New Yorker, he described himself as a “one-issue guy, and my issue is Israel.”