Vladimir Putin the Russian opposition and by international observers from the Organization for Security and Co-operation in Europe for procedural irregularities. Anti-Putin protests took place during and directly after the presidential campaign. The most notorious protest was the Pussy Riot performance on 21 February, and subsequent trial. An estimated 8,000–20,000 protesters gathered in Moscow on 6 May, when eighty people were injured in confrontations with police, and 450 were arrested, with another 120 arrests taking place the following day. A counter-protest of Putin supporters occurred which culminated in a gathering of an estimated 130,000 supporters at the Luzhniki Stadium, Russia's largest stadium.
Anti-American sentiment in Russia Posner shared his opinion that the anti-Americanism is "harmful for Russia" and has solely irrational reasons. One is that Russian people have still not forgiven United States for "winning the Cold War" (in his opinion, the Cold War, which is not thought by Russians to be lost on the surface, is felt by them lost deep in their minds and is lost in fact). He considers the anti-American rhetoric by Vladimir Putin made to be approved by the nation. According to Moscow Carnegie Center Director Dmitriy Trenin, anti-Americanism in Russia is becoming the basis for official patriotism. Further researcher states