US President Joe Biden’s administration faced growing calls from his fellow Democrats on Wednesday to push Israel to ease the devastating humanitarian crisis in Gaza, with some saying they may try to stop military assistance if conditions for civilians do not improve. “We need to use all the leverage we’ve got. The administration has not used the leverage it has to date. I don’t know how many more kids have to starve before we use all the levers of our influence here, but they really need to do more,” Senator Chris Van Hollen, a Democratic member of the Foreign Relations Committee, told report…