New York, Feb. 15 -- Amazon abruptly dropped plans Thursday for a big new headquarters in New York that would have brought 25,000 jobs to the city, reversing course after politicians and activists objected to the nearly $3 billion in incentives promised to what is already one of the world's richest, most powerful companies.

"We are disappointed to have reached this conclusion - we love New York," the online giant from Seattle said in a blog post announcing its withdrawal.

The stunning move was a serious blow to Gov. Andrew Cuomo and Mayor Bill de Blasio, who had lobbied intensely to land the project, competing against more than 200 other metropolitan areas across the continent that were practically tripping over each other to offer ince...