Some Canadians worry NAFTA replacement will flood markets with lower-cost U.S. milk and cheese.
The president has given Canada until Friday to sign on to a new trade agreement, but the dairy industry has been one of the prime sticking points during negotiations.
The state wants farmers to do more to cut methane emissions from cows and cowpats.
Well, it's complicated.
By The Numbers
It's been tried before, but a new generation of companies is hoping that manure will become the next solar.
Food and Drink
Many dairy farmers culled their herds because of high feed prices caused by the drought, reducing the supply of milk. Price increases will flow through many food products beyond a carton of milk.
The Midwest drought has withered the nation's corn crop and pushed prices up. Now, the market for alternative feed for cattle is skyrocketing -- sending farmers scrambling for cheaper alternatives, like gummy worms and ice cream sprinkles.
Substitutes for expensive corn feed range from the unprocessed -- straw and cottonseed hulls -- to a teenager's diet -- ice cream, chocolate and gummy worms.