This year's prize should go to an American leader who has earned it, for once: Donald Trump. But will the Nobel Committee free itself from its ideological straitjacket to give it to him? President Trump is everything that Obama was not. He is a man of the Right, not the Left. He is brash and intensely disliked by much of world opinion, especially elite opinion. Obama had a soft touch and was loved almost as greatly as Trump is despised. Yet the only thing that should matter is what Trump has achieved, in contrast to what Obama did not.

If President Trump succeeds in negotiating an end to North Korean dictator Kim Jong-un's nuclear provocations, he will have defused the most dangerous crisis the world faces at present. There is even a chance that Trump will help bring a non-violent conclusion to a war that has officially lasted 67 years. The North and South never came to a formal peace agreement in the Korean War and to this day have only an armistice to underwrite the ceasefire. Yet now Seoul and Pyongyang have begun moving toward treaty talks as part of the wider effort to resolve the nuclear impasse, with the South's President Moon Jae-in to meet Kim for a historic summit today.

An American president first won the Peace Prize in 1906, when Theodore Roosevelt received it for brokering peace in the Russo-Japanese War. What Trump is poised to accomplish on the Korean peninsula would be a far greater triumph of diplomacy. That will be so even if the result is something less than what the Trump administration has called for in its maximal demands: the denuclearisation of North Korea. Kim is unlikely to give up his weapons in any scenario, but world peace will be well served if he simply stops further nuclear and ballistic tests and agrees to a non-proliferation framework.

That should certainly be good enough for the Nobel Committee. But the contrast between Trump and Obama suggests why it might not be. Obama came to power promising to pursue peace the Left-wing way, through humility and understanding. His demeanour counted for more than his record, which in 2009 was practically nonexistent. President Trump has used tough language and the threat of violence to change the calculus of war and peace in Korea. The method as much as the man may be unpalatable to the panel.