TEL AVIV, Israel—Israeli Prime Minister Naftali Bennett on Sunday urged world powers to take a hard line against Iran in negotiations aimed at reviving an international nuclear deal, as his top defense and intelligence officials headed to Washington to discuss the flailing talks. Israel has been watching with concern as world powers sit down with Iran in Vienna in hopes of restoring the tattered 2015 deal. Iran last week struck a hard line as talks resumed, suggesting everything discussed in previous rounds of diplomacy could be renegotiated. Continued Iranian advances in its atomic program have further raised the stakes. The original deal, spearheaded by President Barack Obama, gave the Iranian regime much-needed relief from crippling economic sanctions in exchange for curbs on its nuclear activities. But President Donald Trump, with strong encouragement from Israel, withdrew from the deal in 2018, causing it to unravel. Last week’s talks in Vienna resumed …