Russian withdrawal from Transnistria and the Republic of Georgia. Moscow continued to participate in the joint consultative group, because it hoped that dialogue could lead to the creation of an effective, new conventional arms control regime in Europe. Russia did specify steps that NATO could take to end the suspension. "These include [NATO] members cutting their arms allotments and further restricting temporary weapons deployments on each NATO member’s territory. Russia also want[ed] constraints eliminated on how many forces it can deploy in its southern and northern flanks. Moreover, it is pressing NATO members to ratify a 1999 updated version of the accord, known as the Adapted CFE Treaty, and demanding that the four alliance members outside the original treaty, Estonia, Latvia, Lithuania, and Slovenia, join it." In early 2007, "Dissenters' Marches" were organized by the opposition group The Other Russia, led by former chess champion Garry Kasparov and national-Bolshevist leader Eduard Limonov. Following prior warnings, demonstrations in several Russian cities were met by police action, which included interfering with the travel of the protesters and the arrests of as many as 150 people who attempted to break through police lines. On 12 September 2007, Putin dissolved the government upon the request of Prime Minister Mikhail Fradkov. Fradkov commented that it was to give the President a "free hand" in the run-up to the parliamentary election. Viktor Zubkov was appointed the new prime minister. In December 2007, United Russia—the governing party that supports the policies of Putin—won 64.24% of the popular vote in their run for State Duma according to election preliminary results. United Russia's victory in the December 2007 elections was seen by many as an indication of strong popular support of the then Russian leadership and its policies. 2008–2012: Second premiership Putin was barred from a third consecutive term by the Constitution. First Deputy Prime Minister Dmitry Medvedev was elected his successor. In a power-switching operation on 8 May 2008, only a day after handing the presidency to Medvedev, Putin was appointed Prime Minister of Russia, maintaining his political dominance. Putin has said that overcoming the consequences of the world economic crisis was one of the two main achievements of his second premiership. The other was stabilizing the size of Russia's population between 2008 and 2011 following a long period of demographic collapse that began in the 1990s. At the United Russia Congress in Moscow on 24 September 2011,