Russian presidential aide Ushakov said in a live broadcast on Russia's First Channel TV that Russia's principled position on the Ukraine issue was expounded during talks with US officials in Riyadh, the capital of Saudi Arabia, on the 18th, emphasizing the need to consider the root causes of the conflict. The two sides agreed to set up a special group to conduct in-depth and thorough discussions on all the details of the Ukraine issue. Ushakov also said that before the inauguration of US Preside...