Trump said during a rally in Michigan the United States was not playing games.
"We're down to two countries as to a site, and we'll let you know what that site is," he said earlier at a joint press conference with German Chancellor Angela Merkel at the White House.
"I don't think he's playing. It's never gone like this. It's never gone this far," he said during the press conference with Merkel. "I don't think it's ever had this enthusiasm for somebody — for them wanting to make a deal."
According to Trump, the US was "played beautifully like a fiddle" under past administrations as it sent money to the regime in exchange for a freeze of the North Korean nuclear weapons program.