What changes and challenges did the Democratic Party face after the rise of the Republican Party?

After 1912, the Party underwent a social ideological shift to the right. Following the Civil Rights Act of 1964 and the Voting Rights Act of 1965, the party's core base shifted, with Southern states becoming more reliably Republican in presidential politics.

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;

treating native americans justly and giving them equal rights as citizens of the united states" was not a way in which americans sought to solve the indian problem. removal was the most popular idea.