dubai iranian supreme leader ayatollah ali khamenei say wednesday u.s. president donald trump would fail harden stance towards iran say tehran strong time powerful smart ronald reagan reagan powerful smart trump good actor make threats also move us shoot plane khamenei say speech carry state television 1988 u.s. warship shoot iranian passenger plane gulf kill 290 aboard incident washington say mistake tehran say deliberate attack iran war neighbor iraq reagan go accord beliefs face god retribution ... iran make great advance areas since reagan time khamenei add trend continue current american president hop part islamic republic would back weaken futile trump refuse october certify tehran comply 2015 nuclear deal world power warn might ultimately terminate agreement announce shift u.s. policy speech detail aggressive approach iran nuclear ballistic missile program support militant group middle east nuclear deal sanction iran lift return tehran roll back technologies nuclear bomb-making potential trump fail iran 'smarter reagan khamenei