Step-by-step explanation:
1. Remember, the 14th Amendment brought about a landmark change in the US constitution, one of which included granting anyone born in the United States the title of a citizen regardless of their color (black or white). This ruling made invalid the earlier Dred Scott v. Sandford Supreme Court case in 1857 (in which the Judge ruled that Mr. Dred Scott could not be considered a citizen because he was black, not White).
2. The RR (Radical Republicans) oppose President Johnson's approach to Reconstruction simply because they wanted absolute equality for African Americans, while President Johnson didn't want the same.
3. It depends on the particular policies involved.