WASHINGTON – 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.A tense phone call between the two leaders appeared to yield at least some results, as Netanyahu’s office announced within hours it would temporarily allow more aid to flow into Gaza.Biden has stood solidly behind Israel and its prime minister since Hamas’s October 7 attacks, and his criticism of civilian deaths in Gaza has not stopped Washington from supplying military hardware to its…