FILE - Sen. Patrick Leahy, D-Vt., waits in the Old Senate Chamber to reenact his swearing in as President Pro Tempore of the Senate on Capitol Hill in Washington, Dec. 18, 2012. Israel expects its top ally, the United States, to announce that it?s blocking military aid to an Israeli army unit over gross human rights abuses in the Israeli-occupied West Bank before the war in Gaza began six months ago. The move would mark the first time that a U.S. administration has invoked a 27-year-old congressional act known as the Leahy law against an Israeli military unit. (AP Photo/Susan Walsh, File)