Add Yahoo as a preferred source to see more of our stories on Google. Panama's Supreme Court has annulled contracts allowing a Hong Kong-based company to operate container ports on the Panama Canal.

By Promit Mukherjee, Andrew Mills and Federico Maccioni OTTAWA/DOHA/DUBAI, Jan 20 (Reuters) - Canadian Prime Minister Mark Carney is trying to foster a new global trading order by working more closely with China and inking smaller trade deals, but faces constraints from Canada's still overwhelming economic dependency on the United States.