States, nation face off over fuel-efficiency.

A Friday protest in Northeast Portland underscored a critical debate now raging in Congress: whether auto manufacturers? concerns about new federal emission standards should outweigh those of American consumers ? and states like Oregon ? as they move toward more fuel-efficient vehicles. A handful of Portland Prius owners, along with two environmental groups, blasted Toyota Motor Corp. at a local dealership Friday, saying the company is casting ?a green halo? over its products while it lobbies Congress to reject new emissions standards for vehicles.