U.S. President Donald Trump pitched his 50% tariffs against Brazil as a way to support former President Jair Bolsonaro, but three people close to the right-wing ex-president said they were stunned by the move and fear it may do more harm than good.

A statement from the US trade representative noted that the probe will focus on the Brazilian government’s policies “related to digital trade and electronic payment services; unfair, preferential tariffs;

The United States has begun investigating Brazil’s trade practices and “anti-corruption interference,” after the president’s criticisms of Brazil’s treatment of Jair Bolsonaro, a Trump ally.