<span>In 1950, with Senator McCarthy and other arousing fears of Communist spies, Congress passed the Internal Security Act, usually called the McCarran act.
</span>The Internal Security Act<span> of 1950, 64 Stat. 987 (Public Law 81-831), also known as the Subversive Activities Control </span>Act<span> of 1950 or the</span>McCarran Act<span>, after its principal sponsor Sen. Pat </span>McCarran<span> (D-Nevada), is a United States federal law.
</span>Hope this helps!:)
I believe it was because it was a key source in fueling trains. That was important because the railroads were the key source in transportation of goods and communication between the states.
One success of Reconstruction was the "b.shift in the balance of power toward the federal government", since many of the laws aimed at increasing the rights of African Americans failed to be properly implemented.
