David Langdon is a key player among a small army of lawyers working to keep secret the origins of millions of dollars coursing through the American political system.
Since the 2010 election cycle, at least 11 groups connected to David Langdon and his firm have spent about $22 million on federal and state elections and ballot initiatives.
Two groups connected to Langdon spent more than $1 million on the 2012 presidential election.
David Langdon was a lead author of a state constitutional amendment defining marriage as between a man and a woman, which Ohio voters passed in 2004. The U.S. Supreme Court last month heard arguments on whether the Ohio ban is constitutional.
A Center for Public Integrity review of federal and state election filings and nonprofit tax documents shows more than $1.3 million in payments from eight groups to the firm or Langdon since 2010.