The two countries are already involved in bitter disputes with the European Union over the banning of some GM products and North American meat reared with hormones.

BBC: Fight on GM food labelling

The EU has still failed to lift a ban, declared illegal by the WTO six years ago, on American and Canadian beef from cattle treated with growth hormones.

ECONOMIST: Invasion of the transgenics

Given a national stage every March, this heady mix of hormones, pride, love and self-esteem makes the NCAA tournament a uniquely meaningful occasion in American sports.

WSJ: The Emotional Logic of March Madness