The United States has decided to investigate Brazil’s trade activities. This means they will look closely at the rules and methods Brazil uses for business with other countries.
This investigation started after the U.S. President expressed unhappiness. He was concerned about how Brazil was treating Jair Bolsonaro, a political ally of his.
The president believes that some of Brazil's actions are unfair. The investigation will focus on Brazil's trade practice to see if the U.S. concerns are valid.
Another point of the investigation is something called “anti-corruption interference.” This suggests the U.S. is also worried about fairness in Brazil's government actions, especially when they affect people like Bolsonaro.