One of the most aggressively pro-Israel Democrats in Congress is quietly trying to extend a yearlong ban on U.S. funding for the United Nations agency helping Palestinians circulating a message telling fellow members of Congress that they have a shared responsibility to ensure that U.S. humanitarian assistance is used to foster an open and safe society and not propagate terrorism and further division.The gambit that hawkish Rep. Josh Gottheimer (N.J.) launched on Tuesday underscores how...