Summit with Kim after Nov polls: Trump

US President Donald Trump said on Tuesday his second summit with North Korean leader Kim Jong Un would be held after US congressional elections on November 6.

Speaking to reporters as he flew to Iowa for a political rally, Trump said: "It'll be after the midterms. I just can't leave now."

Earlier on Tuesday, Trump told reporters that plans were being made for his second summit with Kim and that he thought "incredible" progress had been made in US talks with the long-isolated North Asian country.

He said Secretary of State Mike Pompeo had very good talks with Kim over the weekend and that three or four locations were being considered.

Pompeo echoed Trump's comments when he spoke briefly to reporters during a Tuesday afternoon visit to the White House.

"While there's still a long way to go and much work to do, we can now see a path where we will achieve (our) ultimate goal, which is the full and final verified denuclearization of North Korea," he said.