The Fourteenth Amendment. The Fifth Amendment has a due process clause as well, but the Fourteenth is the one that defines citizenship.
Answer:
article two of the united states constitution establishes the executive branch of the federal government, which carries out and enforces federal laws.
They became rivals because each one wanted more power than the other for example in world war 2 the USA made the atomic bomb which showed the world that the Americans were the most powerful country but after ww2 Russia and USA started a Cold War which lead to the feud between there political views and the start of better technology and the space race