Trump concludes tour of Asia and says trade rules 'have changed' under his watch

US President Donald Trump has wrapped up a tour of Asia, saying that all countries that trade with the US "know that the rules have changed".

"The United States has to be treated fairly and in a reciprocal fashion," Trump tweeted from Manila, the final stop before he arrives back in Washington on Tuesday. "The massive TRADE deficits must go down quickly!" he added.