[{"Amount spent": "$6,574,257", "Groups": "California Teachers Assn. "}, {"Amount spent": "$4,998,796", "Groups": "California State Council of Service Employees "}, {"Amount spent": "$4,273,664", "Groups": "Western States Petroleum Assn. "}, {"Amount spent": "$3,517,591", "Groups": "City of Vernon "}, {"Amount spent": "$3,014,998", "Groups": "Kaiser Foundation Health Plan Inc. "}, {"Amount spent": "$2,964,237", "Groups": "Chevron Corp. and subsidiaries "}, {"Amount spent": "$2,960,890", "Groups": "California Chamber of Commerce "}, {"Amount spent": "$2,639,864", "Groups": "California Hospital Assn./California Assn. of Hospitals and Health Plans "}, {"Amount spent": "$2,391,067", "Groups": "California Manufacturers and Technology Assn. "}, {"Amount spent": "$1,944,366", "Groups": "AT&T and affiliates "}]