Mayor Bloomberg definitively closed the door yesterday on the possibility of making a run for the White House in 2012.

“No,” he told a reporter in Hong Kong when asked for the umpteenth time about his possible presidential aspirations.

“Definitely no?” the reporter pressed.

“Definitely not. I have a job for the next 1,152 days, and I plan to serve out every one of them,” the mayor said.

Bloomberg was recently elected chairman of the C40, a group of cities dedicated to tackling climate change, and is visiting China for a climate conference.