NEW YORK (Reuters) - U.S. presidential candidate Hillary Clinton said in a speech to a pro-Israel lobby group in Washington on Monday Iran still posed a threat to Israel and needed to be closely watched. Speaking to the annual policy conference of the American Israel Public Affairs Committee, Clinton, the Democratic front-runner, also criticized her Republican rival Donald Trump for having a “neutral” stance on Israel.  She said U.S. leaders needed to show loyalty to its Mideast ally and “anyone who doesn’t understand that has no business being our president.” 