A proposal to require labeling of genetically engineered foods and seeds in Washington state enjoyed broad public support in polls this summer. That was before some of the largest food companies swooped in to spend more so consumers would know less about what they are eating. The Grocery Manufacturers Association, a Washington-based trade group that represents companies such as ConAgra Foods and Kraft Foods, was responsible for $11 million of the $22 million campaign against the initiative, compared with about $9 million by pro-labeling advocates. The GMA's campaign made the difference. The initiative, which had 66 percent support in a September survey, was defeated by 51 percent to 49 percent. The grocers, who opposed the proposal as arbitrary and costly for businesses, raised more than $2.3 million from PepsiCo Inc. and about $1.5 million each from Coca-Cola Co., [and] Nestle USA. Those groups also were part of a $45 million campaign that defeated a labeling initiative in California last year. Spending is not a problem" for organizations opposed to labeling requirements, said Colin O'Neil, director of government affairs for the Center for Food Safety, which backed the Washington state initiative. "These companies will spend whatever it takes to defeat labeling at the state level." If that's the case, the trade associations and their members will be issuing a lot more checks as fights over labeling food are breaking out in other states and advocates are pressing the matter in Congress with proposed legislation from both sides awaiting action.