Which controversial concept was the foundation of the kansas nebraska act? ?

it the big letter b heart my answer

answer:

won re-nomination with no opposition he also had the support of his party

explanation:

it saw incumbent president andrew jackson, candidate of the democratic party, defeat henry clay, candidate of the national republican party. jackson won re-nomination with no opposition, and the 1832 democratic national convention replaced vice president john c. calhoun with martin van buren.

if i am correct the answer is going to be a) the federal program of reconstruction ended.