Israel started a long-threatened push into the heart of Gaza City after US President Trump’s top diplomat warned Hamas there’s a “very short window” for negotiations to end the war. Dan Williams has the latest from Jerusalem. -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.bloomberg.com for business news & analysis, up-to-the-minute