In 1989, elections were held for the Congress of People's Deputies of the Soviet Union. The main elections were held on 26 March and a second round on 9 April. They were the first relatively free nationwide elections held in the Soviet Union, and would prove to be the final national elections held before that country dissolved in 1991. While the majority of CPSU-endorsed candidates were elected (84 percent of the Congress consisted of the CPSU candidates by Gorbachev's estimate) over 300 candidates won out over the endorsed candidates. Among them were Boris Yeltsin, who won over the CPSU-endorsed candidate to represent Moscow's district with 89% of the vote. It was Yeltsin's first return to political power after resigning from the Politburo in 1987.