Wisconsin Club for Growth has launched a new legal volley in its well-funded effort to thwart the state’s John Doe campaign finance probe.

Wisconsin Governor Scott Walker's campaign is reportedly negotiating a settlement with prosecutors in the long-running "John Doe" criminal campaign finance probe -- and the Wall Street Journal editorial board, which for months has attacked prosecutors and portrayed the investigation as baseless, is livid.

Whomever is bankrolling AFP's $900K pro-Walker ad buy can write-off the expenses as a charitable contribution, just like a donation to a neighborhood church or the American Red Cross.