Genetically modified organism
House Dems also want Obama to keep a campaign pledge to impose labeling requirements.
The corn byproduct contained an insect-resistant strain.
The California Democrat said she believes the FDA has authority to require labeling.
Crucial players press for legislation to institute a national system.
The Washington State measure's failure would reflect the latest in a series of high-profile defeats...
Opponents poured $22 million into a campaign to defeat the high-profile Washington state measure...