Rio de Janeiro: Brazil's President Jair Bolsonaro is weighing the nomination of his son Eduardo, a federal MP, to become the nation's ambassador to the US as he seeks to strengthen ties with Donald Trump.

Bolsonaro said he was considering the "cost-benefit" of the decision.

"Imagine if Mauricio Macri's son were here in Brazil as ambassador," he said, referring to Argentina's President. "Obviously, he would get different treatment than that given to a normal ambassador."

Brazilian congressman Eduardo Bolsonaro, right, meets with Argentina's President Mauricio Macri in May. Eduardo is one of President Jair Bolsonaro's three sons. Credit:Facebook/@Eduardo Bolsonaro

Eduardo Bolsonaro, 35, is president of the lower house's Foreign Relations Committee. He was elected with a record number of votes to Congress last year, at the same time his father was elected.