ɪn wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd nˈaɪnti, ˈæmɚ wʌz ᵻlˈɛktᵻd vˈaɪspɹˈɛzɪdənt ʌvðə ɡɹˈɛnoʊbəl dᵻɹˈɛktɚɹi, ænd bɪkˌeɪm ɐ dˈɛpjuːɾi tə ðə nˈæʃənəl kənvˈɛnʃən fɚðə dˈeɪpɑːɹtmənt ʌv ˈaɪsɚ, ænd dʒˈɔɪnd ðə mˈaʊntɪn, vˈoʊɾɪŋ ɪn fˈeɪvɚɹ ʌv lˈuːi ɹˌoʊmən sˈɪkstiːn ˌɛksɪkjˈuːʃən dˈʊɹɹɪŋ hɪz tɹˈaɪəl.
In 1790, Amar was elected vice-president of the Grenoble directory, and became a deputy to the National Convention for the département of Isère, and joined The Mountain, voting in favor of Louis XVI's execution during his trial.