It likes to present itself as a grassroots insurgency made up of hundreds of local groups intent on toppling the Washington elite.
But the Tea Party movement, which is threatening to cause an upset in next month's midterm elections, would not be where it is today without the backing of that most traditional of US political supporters – Big Oil.
The billionaire brothers who own Koch Industries, a private company with 70,000 employees and annual revenues of $100bn (£62bn), used to joke that they controlled the biggest company nobody had ever heard of.
Not any more. After decades during which their fortune grew exponentially and they channelled millions of dollars to rightwing causes, Charles and David Koch are finally getting noticed for their part in the extraordinary growth of the Tea Party movement.
http://www.guardian.co.uk/world/2010/oct/13/tea-party-billionaire-koch-brothers