Question

What constitutional issues were raised by federal policies during world war one

Answer 1

The constitutional issues that were raised by federal policies during the war is that there's a return to isolationism. 
This was brought by the world war I, the congress passed the Neutrality Acts, where it prohibit the Americans to travel on ships of nations at war.
 Other consequence is that they're not also allowed to sell arms to nations at war.
 Only non-military good are allowed to be sold.

Answer 2

The correct answer to this open question is the following.

The constitutional issue that was raised by federal policies during World War 1 was the issue of isolationism, the concern of maintaining a neutral foreign approach from the affairs of other countries.

President Woodrow Wilson had kept his promise to maintain neutrality in World War 1 until the US was forced to enter the war due to incidents such as the sinking of the Lusitania ship and the Zimmerman telegram. After the world, the federal government again considered the issue of isolationism and passed the Neutrality Act in 1935 that limit the participation of the United States in foreign affairs. Other Neutrality Acts were passed in 1936, 1937, and 1939.