Rep. Steve King (R-Iowa) strongly opposes state laws that restrict sales of agricultural products in Iowa unless they were produced to that state’s specifications. So much so that he introduced an amendment to this year’s farm bill: The Protect Interstate Commerce Act.

In an Op-Ed he wrote Sunday for the National Cattlemen’s Beef Association, King referenced a California law mandating cage size for eggs sold in that state, saying it “places an incredible burden on farmers across the nation” and warning that eggs prices could follow the trend in Europe and rise dramatically.

According to King, the amendment will “restore the Commerce Clause as it was written in the Constitution,” asserting that recent state regulations have bent the intention of the Commerce Clause.

Meanwhile, other lawmakers would like to make California’s egg law national. Sen. Dianne Feinstein (D-Calif.) has written a bill to create a national standard for the cage size of egg-laying hens. According to The LA Times, however, the bill is meeting resistance from farm-state lawmakers like King.