A pair of campaign finance watchdogs have asked federal regulators to investigate a deal between U.S. Sen. Ted Cruz and San Antonio-based radio group iHeartMedia that’s funneled some $630,000 in ad revenue into a fundraising entity that lists its key goal as ensuring Cruz’s reelection. Made Tuesday with the Federal Election Commission, a filing by nonprofit groups Campaign Legal Center and End Citizens United argues the arrangement between the Republican senator and the media group violates federal election law. Cruz’s office has said he makes no money from a podcast called The Verdict With Ted Cruz that iHeartMedia syndicates to hundreds of radio stations.