What constitutional issues were raised by federal policies during the war?

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 Nuetrality 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.