When did the declaration of independence?

Why did some states believe they had the power to overturn federal laws?

How does the power of the supreme court act as a check on the other branches of government

After the success of the sputnik launch, the united states feared that they would never be able to launch their own satellite, the ussr had used technology developed by the united states, the soviets had superior nuclear capabilities, that any future us satellites would not be as successful.