White House: US ‘continues to actively prepare’ for summit

FILE- In this May 16, 2018, file photo, President Donald Trump listens to a question in the Oval Office of the White House in Washington. Trump's hard-line views on trade, a staple of his message long before he entered politics, are beginning to collide with the cold realities of global geopolitics. Trade talks on China and the North American Free Trade Agreement have hit stumbling blocks, posing a challenge for a president who vowed to make trade deals more equitable for the United States during his 2016 campaign and famously tweeted that trade wars are "easy to win." (AP Photo/Evan Vucci, File)
In this May 28, 2018 photo, Japanese Prime Minister Shinzo Abe walks out from his official residence to meet journalists after talking on the phone with President Donald Trump in Tokyo. The White House says President Donald Trump and Japanese Prime Minister Shinzo Abe plan to meet in advance of the "expected meeting" between Trump and North Korea's leader. (Keizaburo Fukuhara/Kyodo News via AP)/Kyodo News via AP)

In this image made from video, Kim Yong Chol, center, a former military intelligence chief who is now Kim Jong Un’s top official on inter-Korean relations, walks through Beijing airport after his arrival Tuesday, May 29, 2018. He was at North Korean leader Kim Jong Un’s side at the table in last weekend’s North-South summit, and had been a prominent senior official in other important talks. It was not possible to confirm the reason for his visit to Beijing, or if he would be traveling on to another destination. (AP Photo)

WASHINGTON — Rapid-fire diplomacy played out on two continents Tuesday in advance of an “expected” summit between President Donald Trump and North Korea’s Kim Jong Un, the strengthening resolve coming after a series of high-risk, high-reward gambits by the two leaders.