Israel’s decades-old US support risks losing Democrats

For generations, support for Israel united Washington. Now Israel’s attacks on Gaza, the Iran war and Prime Minister Benjamin Netanyahu’s close ties to U.S. Republicans are eroding Democratic backing, threatening to turn one of America’s closest alliances into a partisan divide.

Support for Israel among Democratic voters has plummeted, candidates critical of Israel are winning Democratic primaries and even moderate lawmakers are increasingly willing to challenge decades of U.S. support for...