A high-profile Wednesday vote in Congress could send a major signal about the Democratic Party establishment, Israel and the future of U.S. foreign policy. Democratic senators could soon send a historic message that Washington is grappling with the devastating wars in Iran, Lebanon and Gaza — and moving toward a foreign policy overhaul by reconsidering the flow of American weaponry to Israel. On Wednesday evening, the Senate will consider legislation led by Sen. Bernie Sanders (I-Vt.) that