Sweeping tariffs set to be imposed by President Donald Trump next month may cast a pall over his top diplomat’s first official trip to Asia this week — just as the U.S. seeks to boost relations with Indo-Pacific nations to counter China’s growing influence in the region.

President Donald Trump made clear today that there’s no wiggle room for his new Aug. 1 threat of hefty tariffs on 14 countries, along with however many more receive letters in the coming days. “There has been no change to this date,

China warned the Trump administration on Tuesday against reigniting trade tension by restoring tariffs on its goods next month, and threatened to retaliate against nations that strike deals with the United States to cut China out of supply chains.

Its new deal with Vietnam and its fresh tariff threats issued to many other countries seem designed to reduce China’s role in their supply chain. Countries that had hoped to stay out of the new cold war now fear they are being forced to pick a side. To appease the world’s biggest market, they must anger the world’s biggest trader.

The Yale Budget Lab noted that the letters sent Monday would hike the effective tariff rate on U.S. consumers to the highest since 1934.