President Trump is again amping up his trade threats, unveiling a new batch of letters to country leaders outlining tariffs on goods imported from their countries beginning in August. Trump on Wednesday posted to social media six letters,

Trump on April 2 proposed a 20% tariff for EU goods and then threatened to raise that to 50% after negotiations did not move as fast as he would have liked, only to return to the 10% baseline. The EU has 27 member states, including France, Germany, Italy and Spain.

The U.S. started imposing tariffs by letter to a variety of countries Monday, pairing new rates with an explicit warning that even those could change at any time. Why it matters: After months of threats,