Prime Minister David Cameron is planning a vote on Britain's membership in the European Union after the 2015 elections. However, nation's Labour Party has already pledged not to support this vote, ending high-level debate over changing its stance to the Conservatives ahead of the upcoming election. This decision leaves Cameron's Conservatives as the only big party, which expressed its commitment to an in/out vote. In January Cameron claimed he would seek a new EU deal for the country and hold a membership referendum by the end of 2017. However, critics said the leading bloc has become too powerful posing a threat to the sovereignty.