David Atchison announced that he would support the Nebraska proposal only if slaveholders were not banned from the new territory. While the bill was silent on this issue, slavery would have been prohibited under the terms of the Missouri Compromise. Other Southern senators were not as flexible as Atchison. By a vote of 23 to 17, the Senate voted to table the motion, with every senator from the states south of Missouri voting to table.
Yes it completely makes it so third party candidates cannot become president. Presidential candidates who did not win a majority of the popular vote were elected president because of the electoral college. Presidential candidates mainly only campaign in swing states.
