ɪn hɪz spˈiːtʃᵻz vˈæn bjˈʊɹɹən fɹˈiːkwəntli ˈɑːɹɡjuːd ɐɡˈɛnst slˈeɪvɚɹi, kˈɔːlɪŋ ɪɾ ɐ dᵻɡɹˈeɪdɪŋ ˈɪnfluːəns ˌɔn fɹˈiː lˈeɪbɚ.
In his speeches Van Buren frequently argued against slavery, calling it a degrading influence on free labor.