US President Donald Trump said Monday he would be "very kind" to trading partners when he unveils further tariffs this week, risking global turmoil to address what he says are unfair trade imbalances.

Trump -- who has been making unprecedented use of presidential powers since taking office in January -- said he could announce as early as Tuesday night exactly what "reciprocal tariffs" will be imposed.

The Republican billionaire insists that reciprocal action is needed because the world's biggest economy has been "ripped off by every country in the world," promising "Liberation Day" for the United States.

He could also unveil more sector-specific levies.
"You're going to see in two days, which is maybe tomorrow night or probably Wednesday."
But he added: "We're going to be very nice, relatively speaking, we're going to be very kind."
Already, China, South Korea and Japan agreed Sunday to strengthen free trade between themselves.