The U.S. Supreme Court heard oral argument on April 25 in Wisconsin Right to Life's (WRTL) challenge to the constitutionality of a campaign finance law that limits certain broadcasts, including grassroots lobbying messages, during federal campaigns. The issue before the Court is whether the law is unconstitutional as applied to the facts of WRTL's 2004 grassroots lobbying radio ads. Much of the argument addressed what standard should be used to define "genuine issue ads" entitled to constitutional protection.