Short answers, pulled from the story.
The Russian Constituent Assembly met for thirteen hours, from four in the afternoon to approximately 4:40 in the morning, on 5-the 6th of January 1918 (New Style) in the Tauride Palace in Petrograd. The following day, deputies found the building locked and the assembly declared dissolved by the Bolshevik-Left SR Soviet government.
The Socialist Revolutionaries won the largest share of the vote at roughly 40.4 percent, based on a partial count of 54 out of 79 constituencies published by N. V. Svyatitsky. The Bolsheviks received between 22 and 25 percent overall, though they were the largest party in urban centers and won 47.9 percent in Moscow.
Lenin argued that the election ballots did not reflect the November 1917 split in the Socialist Revolutionary Party into pro-Bolshevik Left SRs and anti-Bolshevik Right SRs, because the lists had been drawn up before the schism. Many peasant votes intended for the Left SRs instead elected Right SR deputies who opposed the Soviet government.
Komuch, the All-Russian Constituent Assembly Committee, was formed on the 8th of June 1918 when five Constituent Assembly members gathered in Samara and declared it the new supreme authority in Russia. Backed by the Czechoslovak Legions, it grew to around 90 members and controlled much of the Volga-Kama region before being absorbed into the broader Ufa Directory coalition in September 1918.
Historians including Orlando Figes and O. H. Radkey argue that most peasants, who made up 80 percent of the Russian population, saw the Constituent Assembly as a distant city institution dominated by party leaders they did not understand. The Right SRs, who led the assembly, had spent months in the Provisional Government adopting parliamentary methods that distanced them from their peasant base.
Viktor Chernov, who had been elected president of the assembly with 244 votes, eventually fled Russia after his attempts to organize resistance against both the Bolsheviks and the White Movement failed. The SR Central Committee was arrested in 1919, and its leaders were sentenced to death at a 1922 trial, though those sentences were suspended. Thirty-eight assembly members met in Paris in 1921 and formed an exile executive committee, but it proved ineffective.