Bolsonaro is claiming that the U.S. Magnitsky Act, which was created to punish Russian officials for human rights violations, could also play against de Moraes because of his actions against political opponents and free speech.
He said he's learned from Trump while fighting political battles that "you have to work on everything politically."
A source linked to the Trump camp suggested the former president's son's arguments are having an effect, as it is U.S. government policy to fight censorship.
The former president, who has been friendly with President Donald Trump for years, was not able to attend his inauguration after de Moraes made him surrender his passport.
And now, prosecutors are calling for his son's passport to be taken away after lawmakers from Lula's party accused him of committing "crimes against national sovereignty" for his efforts against the Brazilian supreme court in the United States.