By Andrea Shalal, Steve Holland and Daphne Psaledakis (Reuters) – The White House on Friday said the United States would impose sanctions on Russian President Vladimir Putin and Foreign Minister Sergei Lavrov as Washington looks to ramp up pressure on Moscow following Russia’s invasion of Ukraine. The rare but not unprecedented U.S. move to impose sanctions on a head of state would come just a day after Russian forces invaded Ukraine, assaulting by land, sea and air in the biggest attack by one state against another in Europe since World War Two. White House spokesperson Jen Psaki said concert…