President Obama has left Japan without sealing a deal on the Trans-Pacific Partnership, a secretive pact among Pacific Rim countries to establish a free-trade zone encompassing nearly 40 percent of the global economy. The deal has faced mass protest in Japan by farmers and others who say it will cause large-scale poverty and displacement like what happened in Mexico under the North American Free Trade Agreement. Obama said a deal could still be reached if Japan further opens its economy to U.S. products. Obama continues his Asia tour in South Korea today.