North Korea nuclear test poses sanctions dilemma for major powers

WASHINGTON (Reuters) - U.S. presidential candidates and members of the U.S. Congress demanded more sanctions on North Korea on Wednesday after its latest nuclear test, but major powers will likely be reluctant to take the tough steps necessary to force Pyongyang to abandon its weapons programme, former U.S. officials and analysts said.

North Korea is already under a wide array of international sanctions, and diplomats said U.N. Security Council members were expected to discuss the possibility of adding to these in coming days. But steps taken so far stop short of the all-out economic offensive that forced Iran to the nuclear negotiating table.