WASHINGTON — Democrats’ takeover of Congress and growing Republican unease over Israel could trigger the biggest reassessment of US support for its closest Middle East ally in decades, after an election shaped in part by anger over the Iran war. Democrats won both the Senate and House in Tuesday’s midterms. Many winning candidates were progressives who campaigned against military aid to Israel and the US-Israeli war on Iran. Israel’s campaign in Gaza and Prime Minister Benjamin Netanyahu’s embrace of President Donald Trump and other Republicans had already strained decades of bipartisan support for Israel. Democratic control could bring greater scrutiny of military aid and West Bank violence, along with hearings and challenges to Trump nominees, although the president’s veto limits the party’s ability to force major policy changes. One successful progressive was Abdul El-Sayed of Michigan, the first Muslim elected to the US Senate despite Republican attempts to win over Jewish voters who might have been uncomfortable with his faith and his criticism of Israel. There were als