President Trump says he wants Xi Jinping, China’s leader, to call him to talk tariffs. Mr. Xi is ghosting Mr. Trump, and markets are plummeting.

Here’s a quick guide to the Trump administration’s talks with a number of different countries about tariffs and trade, as markets prepare for another week of headlines and signs of potential agreements.

Consumers, businesses, and even the prospects for U.S. manufacturing are all likely to become casualties in the escalating trade war between the U.S. and China, trade experts said.