In the 1992 Harry Turtledove science fiction-alternative history novel The Guns of the South, "Senator Walker" is mentioned as opposing a bill to re-enslave freedmen in a victorious Confederacy, but being blackmailed by the "Rivington" cabal into silencing himself.
ɪnðə nˈaɪntiːnhˈʌndɹɪd nˈaɪnti tˈuː hˈæɹi tˈɜːɾəldˌʌv sˈaɪəns fˈɪkʃənɔːltˈɜːnətˌɪv hˈɪstɚɹi nˈɑːvəl ðə ɡˈʌnz ʌvðə sˈaʊθ, "sˈɛnəɾɚ wˈɔːkɚ" ɪz mˈɛnʃənd æz əpˈoʊzɪŋ ɐ bˈɪl tə ɹˌiːɛnslˈeɪv fɹˈiːdmɛn ɪn ɐ vɪktˈoːɹiəs kənfˈɛdɚɹəsi, bˌʌt bˌiːɪŋ blˈækmeɪld baɪ ðə "ɹˈɪvɪŋtən" kɐbˈɑːl ˌɪntʊ sˈaɪlənsɪŋ hɪmsˈɛlf.