Why do federal district courts not try cases dealing with military matters, grievances against the government, or tax disputes?

Which progressive reform was least related to the causes and effects of world war i? legislation limiting the use of child labor establishing 8-hour workdays for railroad workers reducing tariffs on imported goods expanding women’s rights and the right to vote

What are the two powers that the federal and state governments share?

Which events are correlated but do not necessarily have a causal relationship?