for parties with over 7% support. Russian election law stipulates that parties with representatives in the State Duma are free to put forward a list of candidates for the Duma elections, while parties with no current representation need first to collect signatures. Under the 2009 amendments initiated by Medvedev, the number of signatures required was lowered from 200,000 to 150,000 for the 2011 Duma elections. In subsequent elections, only 120,000 signatures will be required. Foreign policy In August, during the third month of Medvedev's presidency, Russia took part in the 2008 South Ossetia war with Georgia, which drove tension in Russia–United States relations to a post–Cold War high. On 26 August, following a unanimous vote of the Federal Assembly of Russia, Medvedev issued a presidential decree officially recognising Abkhazia and South Ossetia as independent states, an action condemned by the G8. On 31 August 2008, Medvedev shifted Russia's foreign policy under his government, built around five main principles: Fundamental principles of international law are supreme. The world will be multipolar. Russia will not seek confrontation with other nations. Russia will protect its citizens wherever they are. Russia will develop ties in friendly regions. In his address to the parliament on 5 November 2008 he also promised to deploy the Iskander missile system and radar-jamming facilities in Kaliningrad Oblast to counter the U.S. missile defence system in Eastern Europe. Following U.S. President Barack Obama's 17 September 2009 decision to not deploy missile-defense elements in the Czech Republic and Poland, Dmitry Medvedev said he decided against deploying Iskander missiles in Russia's Kaliningrad Oblast. On 21 November 2011, Medvedev claimed that the war on Georgia had prevented further NATO expansion. In 2011, during the performance at the Yaroslavl Global Policy Forum, President Medvedev has declared that the doctrine of Karl Marx on class struggle is extremist and dangerous. Progressive economic stratification which can be less evident in period of economic growth, leads to acute conflicts between rich and poor people in period of downturn. In such conditions, the doctrine on class struggle is being revived in many regions of the world, riots and terrorist attacks become reality, by opinion of Medvedev. In August 2014, President Barack Obama said: "We had a very productive relationship with President Medvedev. We got a lot of things done that we needed to get done." During the official visit to Armenia on 7 April 2016, Prime Minister Dmitry