Telegraph.co.uk | Trump warns allies against trading with Iran as oil prices rally on US restarting sanctions Telegraph.co.uk Donald Trump has warned that any country doing business with Iran will not be able to trade with the US. Sweeping US sanctions on Iran came into effect overnight after Mr Trump signed an executive order to pressure Tehran to renegotiate the "one-sided" ... Oil Extends Gains as Trump Unveils 'Most Biting Sanctions Ever Imposed' on Iran |