The recent announcement that Colombia and the United States have a provisional agreement on issues that have long delayed completion of their free-trade agreement breaks the logjam that has held up a congressional vote on the South Korea, Colombia, and Panama trade deals. These accords, inherited from the Bush administration, could soon be off the administration’s agenda. Now, the White House’s focus can shift to the Trans-Pacific Partnership agreement, which could prove to be President Obama’s defining trade legacy… The partnership involves nine countries: the United States, Australia, Brunei, Chile, Malaysia, New Zealand, Peru, Singapore, and Vietnam. “This is one of the most dynamic parts of the world,” said Bill Reinsch, president of the National Foreign Trade Council. “The real attractiveness is its potential for growth.”