US President Joe Biden faces growing calls to set conditions on military support for Israel (Jim WATSON)President Joe Biden warned Israel of a sharp shift in his policy over the Gaza war Thursday amid growing frustration with Benjamin Netanyahu and mounting domestic pressure in a US election year. In a 30-minute call with Netanyahu after Israeli strikes killed seven aid workers from US-based charity World Central Kitchen, Biden hinted at doing just that. A key Biden confidant had earlier urged him to leverage the huge military aid that Washington gives Israel every year. Biden also reportedly faces pressure even closer to home -- from First Lady Jill Biden. Biden's words, however, have not been matched by concrete steps to limit the billions of dollars in military aid flowing to Washington's bedrock regional ally.