Monsanto and other agribusiness and food companies have spent more than $45m (£28m) to defeat a California ballot measure that would require labelling of some GM foods.
If it passes, it would require labels on GM food sold in supermarkets, but would not cover restaurants. It also has a number of gaping loopholes. For example, the law would not require labels on meat from animals that were fed GM corn.
Even with those caveats, the agribusiness and food companies have outspent the yes side by about five to one trying to kill the bill. Monsanto alone has spent more than $8m.
“I think it’s a David and Goliath story with the companies that manufacture or benefit from genetically engineered food being the Goliath,” said David Newman, president of Maplight, which tracks the influence of money in politics.