US Treasury chief plans steps to isolate Iran, warning allies they are "with us or against us" if they trade with Tehran. Iran's Araghchi calls it a diversion, while Professor Khos

US Treasury chief plans steps to isolate Iran, warning allies they are "with us or against us" if they trade with Tehran. Iran's Araghchi calls it a diversion, while Professor Khoshcheshm says sanctions make success unlikely. Al Jazeera's @KimberlyHalkett reports.