REUTERS/CARLOS BARRIA/KHAMENEI.IR)' title='An illustrative image of US President Donald Trump and Iran's Supreme Leader Ayatollah Ali Khamenei. (photo credit: SHUTTERSTOCK/REUTERS/CARLOS BARRIA/KHAMENEI.IR)' />
Khamenei said Tehran retains a "very pessimistic" overall view of the US and should not tie its national affairs to nuclear negotiations.