President Donald Trump sent out a slew of letters Wednesday to some global trading partners, advising them of tariff levels as high as 50% for their exports to the United States.

The president typically ties his tariffs to trade policy, but he hit Brazilian products with the highest rate of any country's goods largely due to politics.

President Trump’s tariff threat against Brazil to protect his ally, former President Jair Bolsonaro, has sparked political turmoil in the South American country.