Senators opposed the president’s plan to import beef from Argentina and voted three times this week to end his power to enforce sweeping tariffs.

© John Stember for The New York Times

Negotiators announced on Sunday they had preliminarily agreed on several issues ahead of an expected meeting between President Trump and Xi Jinping this week.

Top economic officials met in Madrid for a second day, with deadlines looming on tariffs and a ban on TikTok in the United States if it is not sold by its Chinese owner, ByteDance.