In May 1960, Jenkins joined the Campaign for Democratic Socialism, a Gaitskellite pressure group designed to fight against left-wing domination of the Labour Party.Campbell, Roy Jenkins: A Well-Rounded Life, p. 212. In July 1960 Jenkins resigned from his frontbench role in order to be able to campaign freely for British membership of the Common Market.Campbell, Roy Jenkins: A Well-Rounded Life, pp. 212–213. At the 1960 Labour Party conference in Scarborough, Jenkins advocated rewriting Clause IV of the party's constitution but he was booed.Campbell, Roy Jenkins: A Well-Rounded Life, pp. 210–211. In November he wrote in The Spectator that "unless the Labour Party is determined to abdicate its role as a mass party and become nothing more than a narrow sectarian society, its paramount task is to represent the whole of the Leftward-thinking half of the country—and to offer the prospect of attracting enough marginal support to give that half some share of power".Roy Jenkins, 'And Fight Again', The Spectator (11 November 1960), p. 8.
In May 1960, Jenkins joined the Campaign for Democratic Socialism, a Gaitskellite pressure group designed to fight against left-wing domination of the Labour Party.Campbell, Roy Jenkins: A Well-Rounded Life, p. 212. In July 1960 Jenkins resigned from his frontbench role in order to be able to campaign freely for British membership of the Common Market.Campbell, Roy Je.nkins: A Well-Rounded Life, pp. 212–213. At the 1960 Labour Party conference in Scarborough, Jenkins advocated rewriting Clause IV of the party's constitution but he was booed.Campbell, Roy Jenkins: A Well-Rounded Life, pp 210–211. In November he wrote in The Spectator that "unless the Labour Party is determined to abdicate its role as a mass party and become nothing more than a narrow sectarian society, its paramount task is to represent the whole of the Leftward-thinking half of the country—and to offer the prospect of attracting enough marginal support to give that half some share of power".Roy Jenkins, 'And Fight Again', The Spectator (11 November 1960), p. 8.