China has long been Taiwan’s most important trading partner, the main buyer of its exports and the place where many of its companies make their products, the Wall Street Journal reported. China is also Taiwan’s greatest threat and claims that the island democracy is part of its territory. Now, Taiwan’s ruling political party says it wants to do more to dismantle the commercial ties that for decades have propelled Taiwan’s economic growth. President Lai Ching-te is calling for companies that make semiconductors — Taiwan’s main industry — to stop buying from and selling to China.

U.S. President Donald Trump on Monday set a 25% tax on goods imported from Japan and South Korea, as well as new tariff rates on a dozen other nations that would go into effect on Aug. 1, the Associated Press reported. Trump provided notice by posting letters on Truth Social that were addressed to the leaders of the various countries. The letters warned them to not retaliate by increasing their own import taxes, or else the Trump administration would further increase tariffs.