President Obama has proposed granting Israel the largest package of military aid ever provided by the United States to another nation, but he and Prime Minister Benjamin Netanyahu remain deeply at odds over a figure for the assistance despite months of negotiations.

American officials have balked as their Israeli counterparts insisted on more generous terms for a new 10-year military aid package that could top $40 billion. The divide, which could have broad national security implications for both the United States and Israel, is exacerbated by the pent-up animosity between Mr. Obama and Mr. Netanyahu, which has been stoked by their radically divergent views of the nuclear deal with Iran.

Obama-Netanyahu Rift Impedes U.S. Offer of Record Aid Deal for Israel
http://www.nytimes.com/2016/04/29/world/middleeast/obama-netanyahu-rift-impedes-us-offer-of-record-aid-deal-for-israel.html