Twenty-four members of the House of Representatives have signed a joint letter calling on President Biden to press for a bilateral ceasefire in Gaza, on the basis of grave violations of children’s rights. The letter was authored by Democratic Congressmembers Alexandria Ocasio-Cortez of New York, Mark Pocan of Wisconsin and Betty McCollum of Minnesota. This comes as the powerful lobby group AIPAC, the American Israel Public Affairs Committee, steps up its support for primary challengers to lawmakers who’ve voiced support for a ceasefire. Slate magazine reports AIPAC is expected to spend $100 million in Democratic primaries backing opponents of House progressives.