Scores of world leaders, even those representing America's closest friends, remain wary of Trump.
The dollar jumped to a 3-week top on Tuesday while stock markets in Asia were choppy as an historic US-North Korea summit got underway in Singapore
Singapore, which was North Korea's seventh largest trading partner, suspended trade relations with it last year amid surging tension over its nuclear and missile programmes.
Pope Francis said on Sunday he hoped a forthcoming summit in Singapore between US President Donald Trump and North Korean leader Kim Jong Un will lead to peace for Korea.
Huge security has been deployed for the summit, with parts of the city-state in virtual lockdown.
Trump's cancellation of the summit blindsided treaty ally South Korea, which had brokered the remarkable detente between Washington and Pyongyang.
Friday's response by North Korean Vice Foreign Minister was more conciliatory, specifically praising Trump's efforts for a meet, something which none of his predecessors have ever tried before.
It was on March 8 that a delegation visiting from South Korea came to the White House to deliver a message from Kim Jong Un to Trump
Sweden has had diplomatic relations with North Korea since 1973, and is now one of the few Western countries to have an embassy in Pyongyang.
The North Korean Foreign Minister Ri Yong Ho also accused US President Donald Trump of "setting a fuse of war."
The US Congress reached an agreement to impose new sanctions on Russia for its alleged interference in the 2016 presidential election and its actions in Ukraine.