Since the 1940s, when FDR and Getúlio Vargas were close allies, Brazilian public opinion usually prefer democrats.
However, there is an ongoing far right wave in the Brazilian public opinion (and in other Latin American countries too) because of the misguided policies conducted by Dilma Rousseff, Maduro and Cristina Kirschner. Of course, it is very stupid disliking everything in the left and liking everything in the right because of the mistakes of few left-wing governments, but some people in the Latin American "elites" think like that.
So, there are some Trump supporters in Brazil. Today, they made a rally at downtown São Paulo
http://www1.folha.uol.com.br/mundo/2016/10/1827619-ato-pro-trump-na-paulista-tem-detidos-e-discurso-em-ingles-macarronico-veja.shtml They were few.
Despite these far right groups, Brazilian conservative media, which supported Dilma's removal, is pro-Hillary.
Brazilian conservative media supported the military coup against João Goulart in 1964. LBJ too...