President Trump is willing to consider establishing official relations with North Korea and even eventually putting an embassy in Pyongyang, according to two sources familiar with preparations for the Singapore summit. “It would all depend what he gets in return,” said a source close to the White House. “Denuclearization would have to be happening.”

The sources stressed that this is one of many topics that could be discussed at the summit, and that certainly nothing like that has been decided or is necessarily expected to emerge from Trump’s historic mano a mano with North Korean leader Kim Jong-un.

But the U.S. and North Korean working groups — with engagements in New York, the DMZ and Singapore — have discussed establishing official relations between the two countries that would involve putting a U.S. embassy in Pyongyang.

One of the sources, who is familiar with the president’s thinking, said Trump had made it a point not to reject any ideas headed into the summit.