The Baltimore Sun has this report.
"f you are in a car accident, the driver who hit you can't just drive away. Legally, he or she needs to stick around to face the consequences. But in the political arena, hit-and-run political ads are a growing phenomenon. The candidate attacked doesn't know who did it and thus can't properly respond — and whoever funds the ad can escape totally undetected, shielded from any public accountability. But thoughtful legislation by Del. Jon Cardin and Sen. Jamie Raskin could put an end to this problem in Maryland."