On March 4, 1861, in his first inaugural address, Lincoln said that, because he holds "such a provision to now be implied constitutional law, I have no objection to its being made express and irrevocable".
ˌɔn mˈɑːɹtʃ fˈoːɹ, wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɪksti wˈʌn, ɪn hɪz fˈɜːst ɪnˈɔːɡjʊɹɹəl ɐdɹˈɛs, lˈɪŋkən sˈɛd ðˈæt, bɪkˈʌz hiː hˈoʊldz "sˈʌtʃ ɐ pɹəvˈɪʒən tə nˈaʊ biː ɪmplˈaɪd kˌɑːnstɪtˈuːʃənəl lˈɔː, aɪ hæv nˈoʊ ɑːbdʒˈɛkʃən tʊ ɪts bˌiːɪŋ mˌeɪd ɛkspɹˈɛs ænd ɪɹᵻvˈɑːkəbəl".