On 4 March 1990, Yeltsin was elected to the Congress of People's Deputies of Russia representing Sverdlovsk with 72% of the vote.[24] On 29 May 1990, he was elected chairman of the Presidium of the Supreme Soviet of the Russian Soviet Federative Socialist Republic (RSFSR), in spite of the fact that Gorbachev personally pleaded with the Russian deputies not to select Yeltsin.[25] He was supported by both democratic and conservative members of the Supreme Soviet, which sought power in the developing political situation in the country. A part of this power struggle was the opposition between power structures of the Soviet Union and the RSFSR. In an attempt to gain more power, on 12 June 1990, the Congress of People's Deputies of the RSFSR adopted a declaration of sovereignty. On 12 July 1990, Yeltsin resigned from the CPSU in a dramatic speech before party members at the 28th Congress of the Communist Party of the Soviet Union, some of whom responded by shouting "Shame!"[26]
On 12 June 1991, Yeltsin won 57% of the popular vote in the democratic presidential elections for the Russian republic, defeating Gorbachev's preferred candidate, Nikolai Ryzhkov who got just 16% of the vote. In his election campaign, Yeltsin criticized the "dictatorship of the center", but did not suggest the introduction of a market economy. Instead, he said that he would put his head on the railtrack in the event of increased prices. Yeltsin took office on 10 July, and reappointed Ivan Silayev as Chairman of the Council of Ministers – Government of the Russian SFSR.
On 18 August 1991, a coup against Gorbachev was launched by the government members opposed to perestroika. Gorbachev was held in Crimea while Yeltsin raced to the White House of Russia (residence of the Supreme Soviet of the RSFSR) in Moscow to defy the coup, making a memorable speech from atop the turret of a tank onto which he had climbed. The White House was surrounded by the military but the troops defected in the face of mass popular demonstrations. By 21 August most of the coup leaders had fled Moscow and Gorbachev was "rescued" from Crimea and then returned to Moscow. Yeltsin was subsequently hailed by his supporters around the world for rallying mass opposition to the coup.
Although restored to his position, Gorbachev had been destroyed politically. Neither union nor Russian power structures heeded his commands as support had swung over to Yeltsin. Taking advantage of the situation, Yeltsin began taking what remained of the Soviet government, ministry by ministry—including the Kremlin.