Donald Trump declared that North Korea was no longer a nuclear threat as he arrived back in the US after his historic summit with the country’s leader Kim Jong Un in Singapore.

“There is no longer a Nuclear Threat from North Korea. Everybody can now feel much safer than the day I took office,” Mr Trump tweeted after Air Force One landed in Washington yesterday. “President Obama said that North Korea was our biggest and most dangerous problem. No longer — sleep well tonight!” Mr Trump made his claim even as critics attacked the joint statement that the president signed with Mr Kim. While some experts welcomed the fact that the potential for military conflict had decreased, most argued that Mr Trump had failed to secure any concrete steps towards denuclearisation from his meeting with Mr Kim.

“There is no indication right now that we are winning,” said Sue Mi Terry, a former CIA North Korea expert now at the Center for Strategic and International Studies in Washington. “Trump wants to ‘win, win, win’ but North Korea is doing quite well.”