ozzieron is right about Gerhart Eisler, who was suspected to be a soviet spy. Hanns Eisler, his brother and a pupil of Arnold Schönberg, was therefore also called before the House of Un-American Activities (as Bertolt Brecht, which Eisler often worked with, was too). He left the USA for East Berlin, before he could be deported. He than wrote the music for the national anthem of the DDR (words by Johannes R. Becher: "Auferstanden aus Ruinen").
ozzieron is right about Gerhart Eisler, who was suspected to be a soviet spy. Hanns Eisler, his brother and a pupil of Arnold Schönberg, was therefore also called before the House of Un-American Activities (as Bertolt Brecht, which Eisler often worked with, was too). He left the USA for East Berlin, before he could be deported. He than wrote the music for the national anthem of the DDR (words by Johannes R. Becher: "Auferstanden aus Ruinen").