'By switching his visit from Dec. 9 to Dec. 18, Obama appears to be betting that his presence can - as he has expressed hope for several times in the past - push the negotiations "over the top" toward an agreement.'
This reminds me of a scene from 'Friends' where Monica keeps switching on and off a switch in her apartment which doesn't seem to do anything. Meanwhile, next door, Pheobe is proudly showing Joey her amazing talent of turning on and off the TV simply by blinking, a bit like Barbara Eden in 'I dream of Jeannie'. Obama seems to have started believing his own hype- he can walk on water! He can leap buildings at a single bound! He can make China, India and Russia sign binding agreements to cap carbon emissions!