Answer:
The executive branch has changed greatly since adoption of the Constitution. Many changes have been the result of constitutional amendments. ... Congress can affect presidential power because while the executive branch enforces the laws, Congress makes the laws in the first place. The Constitution explicitly assigns to the president the power to sign or veto legislation, command the armed forces, ask for the written opinion of his Cabinet, convene or adjourn Congress, grant reprieves and pardons, and receive ambassadors .
During this era southerners were against letting slaves be free and many problems and disagreements came with this.
Answer:
Life changed for them because they got more rights and almost the same rights as the common white man which was a huge point in black history.