More than 500 Democratic party staffers and alumni ofJoe Biden’s 2020 campaign have signed an open letter calling for the US president to do more to protect Palestinians and hold Israel accountable for its actions in and over Gaza, where a ceasefire currently holds. The move comes amid a deepening split in Democratic ranks, between some vocal members of its progressive wing – such as Alexandra Ocasio-Cortez – and more centrist figures including Biden who have taken a consistently pro-Israel stance. Biden has come under increasing pressure to take a firmer stance against Israel after the recent conflict in which...