BANGKOK, March 27 (Xinhua) -- Thailand's caretaker Prime Minister Thaksin Shinawatra shrugged off the former opposition bloc's turndown of his proposal on the establishment of the "National Government" on Monday.

    "I've opened the door for them to participate in the second-round political reform process as other approaches need to be approved by the cabinet of an elected administration and the parliament. If they reject the opportunity, it's up to them," the caretaker premier told journalists here on Monday.

    On Monday morning, the three former opposition parties, the Democrat, the Chart Thai and the Mahachon Parties, turned down Thaksin's proposal of inviting all political parties and even representatives of his opponents led by the People's Alliance for Democracy (PAD) to join the "National Government" after the early poll.

    Thaksin brought up the proposal during his election campaign here Sunday evening.

    Asked about his administration's plan on the political reform after the election, Thaksin said a neutral panel comprising of representatives from various sectors would be responsible for the task.

    "The government will work out details of the plan later," he added.

    Responding to comments that his government after the April 2 snap election would become a totalitarian administration, Thaksin said the former three opposition parties had decided not to run in the election themselves.

    "They've decided to boycott the snap election. Nobody bars them from contesting and the constitution does not bar a general election due to a political boycott," he said.

    "Before the dissolution of the House of Representative late last month, my administration was also a single-party government," he said. Enditem