The Great War Discussion

Instructions: 

Read the following Discussion question carefully, then submit an original answer.  Your answer should be at least a few sentences to a paragraph in length.  There is no "right" or "wrong" answer, but your opinion should be well-reasoned and based on fact.  (no references needed) this is just an opinion...

The American mood toward the war in Europe changed dramatically during the late 1910s, from division to patriotic support for the war effort, to at least partial rejection of Wilson's plans for peace.  What factors triggered these changes?  Did public opinion direct government policy, or did the government shape public opinion?