Korea, Iran

We the public do not know half of what is going on behind the scenes between Korea and the USA, but it is clear that there are lots of low-level contacts. But why have there been no contacts between the USA and Iran? Rouhani is a highly enlightened Iranian leader, in danger of being replaced by another Ahmedinejad. The Iranian presence in Iraq and Syria is better justified than that of the USA, and it is probably the best defence against victory for Sunni extremists egged on by the Saudis. Trump's behaviour is frankly crazy.