In reality, the person who humiliated Dmitri Shostakovich at his U.S. press conference in 1949 was not a journalist, as in this film, but the Russian émigré composer Nicolas Nabokov.
The scene where Shostakovich and Tukhachevsky discuss Russia's 'special relationship' with Finland, saying that this means the Finns have to grant Russia military bases whether they want to or not, would remind a 1980s audience of the presence of American bases in Britain.