President Obama's first term in office is being opposed at almost every turn by the noisy protests of the new Tea Party movement - a loose affiliation of conservative Americans against the President's reforms in healthcare and excessive government spending. It criticises Democrats and Republicans and many of its supporters believe the Tea Party can radically change the political landscape in the United States. With Tea Party support Debra Medina made an audacious bid to become governor of Texas on a platform of low taxation, gun ownership and a much-reduced role for the federal government. She talks to Stephen Sackur.