Answer:
THREE BRANCHES OF GOVERNMENT:
- LEGISLATIVE
- EXECUTIVE
- JUDICIAL
Legislative will propose the bills, and send on to executive.
Executive can veto the bill, or approve the bill.
Note - 2/3 of Congress can agree to override the veto.
If the Executive passes, Judicial makes sure it is not unconstitutional.
This is how the laws we use are passed.
During the 1930s, the combination of the Great Depression and the memory of tragic losses in World War I contributed to pushing American public opinion and policy toward isolationism. Isolationists advocated non-involvement in European and Asian conflicts and non-entanglement in international politics.
15th Amendment: "The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude."
This should give you the idea I hope this helps :)