I'm afraid I don't agree with your assessment that the Colombian agreement has stopped in the U.S. Every indication that I've been given is that some negotiations are under way and that they expect to proceed with the Colombian and the Korean agreements. It will definitely go forward; it's the timing of when, but it's probably this year.
Evidence of meeting #32 for International Trade in the 39th Parliament, 2nd Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was colombian.
A recording is available from Parliament.