Russia's becoming a republic in February, 1917, meant that the United States could say that it was now fighting for a more democratic cause than that of the Central Powers, [something I make note of here.] (http://www.reddit.com/r/AskHistorians/comments/39zule/why_did_wilsons_plan_for_neutrality_during_wwi/) Beyond that, there were no other discernible affects that I can identify.