The on-again, off-again summit meeting between U.S. President Donald Trump and North Korean leader Kim Jong Un is now on again, Trump announced June 1. The summit's June 12 date and its Singapore venue remain the same as under the plan developed before last week's announcement by Trump that he was canceling the meeting because of combative rhetoric from the North Korean foreign ministry. The latest about-face came after high-level North Korean official Gen. Kim Yong Choi visited the White House. In the end, the flare-up between the two sides that led to the temporary cancellation may have been as much about the negotiating styles of both Trump and North Korea as any substantive issues between the two sides....