President Donald Trump dramatically stepped up his rhetoric against Iran’s supreme leader on Tuesday amid the country’s ongoing fighting with Israel, saying on social media that the United States knows where Ayatollah Ali Khamenei is located but will not kill him “for now.” The comments fuel questions as to whether Washington would join Israel’s attacks after insisting it had no hand in the campaign. Trump’s sometimes contradictory and cryptic messaging about the conflict has deepened the uncertainty surrounding the crisis. His public comments have ranged from military threats to diplomatic overtures, not uncommon for a president known for an often erratic approach to both domestic and foreign policy. In another post, Trump also appeared to demand Iran’s “unconditional surrender!” as he fuelled questions about whether the US would join Israel’s attacks on Tehran’s leadership and nuclear facilities. “We know exactly where the so-called ‘supreme leader’ is hiding. He is an easy target, but is safe there — We ar...