 Complete the following phrase:  With Trotsky largely marginalized, Zinoviev and Kamenev had a falling out with Stalin at the XIVth Communist Party Conference in April 1925 over Stalins October 1924 proposal of Socialism in One Country, which Zinoviev and Kamenev now openly opposed. By this time, the Right Opposition leader, Bukharin, had elaborated on Stalins socialism in one country policy, giving it a theoretical justification. This solidified the Right Opposition as Stalins main allies, as the triumvirate of Stalin-Zinoviev-Kamenev from recent years broke up. Soon after the April 1925 Conference, Zinoviev and Kamenev formed the New Opposition, but they were defeated by Stalin, who was again supported by Bukharin and Rykov, at the 