When, in early 2005, Ariel Sharon's right-wing coalition was in trouble due to disagreements over the disengagement plan, Peres led his party into Sharon's coalition for the purpose of supporting the plan. During the coalition negotiations, Peres demanded to be appointed Acting Prime Minister, but was turned down, since the position was already occupied by Ehud Olmert. Labour then demanded that the government change the Basic Law: the Government, in order to enable two acting Prime Ministers at the same time, but received no support for such action.