Adirect result of landlords not maintaining their tenements during the early 1900's was that

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)