Why was it a problem for the USA that China turned Communist to n 1949

Because the US was using the policy of containment

Explanation: During the cold war the US adopted the policy of containment to completely stop the spread of communism and with china turning communist it could lead to a whole chain of other smaller countries that are looking and china to turn communist and that was a major problem to the US.

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.

i think iowa because you committed the crime there