Which constitutional provision, according to some people, was violated when the u. s. government interned (confined) japanese-americans during world war ii?

With the rise of international conflicts around the world in the 1930s, Congress passed the Neutrality Acts of 1935, 1936, and 1937 (49 Stat. 1081, 49 Stat. 1152, 50 Stat. 121).These laws required registration and licensing by a National Munitions Control Board of all persons trading in munitions and a mandatory embargo on the export of arms, ammunition, and implements of war, and on loans and credits to all belligerents or to neutrals for transshipment to belligerents. An embargo would take effect when the president found a state of war to exist. 

What area are in blue