When Douglas was selected as the candidate of the Northern Democrats, delegates from eleven slave states walked out of the Democratic convention; they opposed Douglas's position on popular sovereignty, and selected incumbent Vice President John C. Breckinridge as their candidate.
wˌɛn dˈʌɡləz wʌz sᵻlˈɛktᵻd æz ðə kˈændᵻdˌeɪt ʌvðə nˈɔːɹðɚn dˈɛməkɹˌæts, dˈɛlɪɡˌeɪts fɹʌm ᵻlˈɛvən slˈeɪv stˈeɪts wˈɔːkt ˌaʊɾəv ðə dˌɛməkɹˈæɾɪk kənvˈɛnʃən; ðeɪ əpˈoʊzd dˈʌɡləzᵻz pəzˈɪʃən ˌɔn pˈɑːpjʊlɚ sˈɑːvɚɹˌɪnti, ænd sᵻlˈɛktᵻd ɪŋkˈʌmbənt vˈaɪs pɹˈɛzɪdənt dʒˈɑːn sˈiː. bɹˈɛkɪnɹˌɪdʒ æz ðɛɹ kˈændᵻdˌeɪt.