Meeting between Trump and Xi amidst the trade war will be the highlight in Osaka.
US president signed an executive order, which will lock billions of dollars more in Iranian assets.
But Tehran warns of growing risk of military confrontation with US.
Leader says the letter has 'excellent content', according to state-run agency.
An Iranian official says any attack will have international and regional consequences.
It is unknown if the US president changed his mind or his administration was worried about logistics or strategy.
The US president launched his re-election bid by revisiting old themes on illegal immigration and Hillary Clinton.
President says last week’s tanker attacks in the Gulf of Oman only had a 'very minor' impact.
Foreign Ministry reiterates that it is not afraid of 'fighting a trade war.'
Failing which, agreements made at a summit in Singapore a year ago might become a "blank sheet of paper," says North Korea's state news agency.
US president has repeatedly said is getting ready to meet Chinese counterpart at the Osaka summit.
COMMENT | It’s not just a trade war between the egos of Trump and Xi, but the egos of the two countries.
US president says tariff will start at 5 pct and could hit 25 pct by October until Mexico stops border filtration.
'Negotiation has no benefit and carries harm,' says Ayatollah Ali Khamenei.