JERUSALEM (AP) — A leading Israeli general who quit Prime Minister Benjamin Netanyahu ’s war Cabinet after accusing him of lacking a strategy in Gaza has emerged as one of the premier’s most serious challengers in elections scheduled for the fall. His name is Gadi Eisenkot. On Tuesday in Israel , his centrist political party “Yashar!” or “Straight!” was set to formally launch its election season campaign. His rise from the highest ranks of the military could sharpen scrutiny of Netanyahu and