Politicians have typically been given leeway because Facebook operated on the assumption that their posts were newsworthy and part of the public debate. As a result, the company did not apply its regular rules to their posts. But now Facebook will no longer assume newsworthiness for the posts of world leaders, the source said.However, the company will not be ending its newsworthiness exception entirely. The company will continue to use the exception, according to the source, but, in another significant