• President Xi Jinping of China is in Moscow for a meeting with President Vladimir Putin, their third this year.

Up for discussion during the two-day visit: trade deals, their mutual unhappiness about an American missile shield in South Korea.

President Trump, frustrated by China’s unwillingness to lean on North Korea, told Mr. Xi on Monday that the U.S. was prepared to act on its own in pressuring the nuclear-armed regime in Pyongyang, according to senior administration officials.