Which constitutional principle was challenged during the Nullification Crisis?

franklin d. roosevelt

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the graphs indicate that few people in bolivia work in industry, as that is the least expressive sector shown in the respective graphic.

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.