"We are going to initiate efforts to bring in a new Chief Minister with the help of our supporting MLAs," Dhinakaran supporter and Andipatti MLA Thanga Tamil Selvan told reporters following a meeting with Governor Ch Vidyasagar Rao, a day after the patch-up between the camps led by Palaniswami and rebel leader Panneerselvam.
The Dhinakaran camp had yesterday claimed the support of 25 AIADMK MLAs.
"We have informed the Governor that we don't have confidence in the Chief Minister," Selvan said after the MLAs owing allegiance to Dhinakaran, nephew of jailed AIADMK general secretary V K Sasikala, met Rao.
Of the 234-member Assembly, the AIADMK has 134 MLAs excluding the Speaker. Late chief minister Jayalalithaa's RK Nagar constituency is still vacant.
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The DMK has 89 seats followed by its allies Congress eight and IUML one seat.
Asked about the possibility of the Palaniswami government facing a trust vote, Selvan said that was "our intention."
"Our intention is that there should be a trust vote. So after that a new Chief Minister will be in place," he claimed.
MLAs supporting Dhinakaran have been on a warpath against Palaniswami, questioning the merger of the Amma faction-led by him and Panneerselvam's Puratchi Thalaivi Amma faction yesterday.
Selvan criticised Palaniswami for aligning with Panneerselvam, who had been critical of the government till very recently.
"He (Panneerselvam) wanted to split the party and topple the government. Yet you (Palaniswami) gave the Deputy Chief Minister's post to him. What is the need for that now?" Selvan asked.
He also expressed anguish over efforts to remove Sasikala from the party, saying it was she who ensured the continuation of the AIADMK government following Panneerselvam's revolt in February last.
Meanwhile, Palaniswami went into a huddle with his Deputy O Panneerselvam and some senior ministers following the development.
In a related development, Dhinakaran announced the removal of senior leader and Rajya Sabha MP R Vaithilingam from the primary membership of the party.
The move came a day after Vaithilingam, a loyalist of Palaniswami, said steps would be taken for the removal of Sasikala from the AIADMK.
Earlier, in his reaction to the merger, Dhinakaran dubbed it as a "betrayal" of party general secretary Sasikala.
In a series of tweets last night, he also questioned the durability of the arrangement.
"It is not a merger. It is a commercial agreement reached for self-interest and hunger for positions and to protect posts," Dhinakaran charged.
His tweets came hours after the factions merged and Panneerselvam, who had challenged Sasikala's leadership, was appointed the deputy chief minister and his close aide K Pandiarajan a minister.
Responding to Dhinakaran's loyalist MLAs meeting the Governor, opposition parties including DMK, said Palaniswami should now prove his majority.
DMK Working President and Leader of the Opposition in the Assembly M K Stalin in a letter to Rao claimed that "consequent upon identical letters given by 22 MLAs to the Governor expressing lack of confidence on the chief minister, an unprecedented constitutional crisis has erupted."
He said in a similar previous occasion in Karnataka, the Governor of that state had directed then Chief Minister B S Yeddyurappa to prove his majority in the House.
Any inordinate delay in asking the chief minister to prove majority would pave the way for continuance of an "unconstitutional" government, he said in the letter, a copy of which was circulated to the media here.
"As the leader of Opposition, I, therefore, request the Governor to direct Palaniswami to prove his majority in the House immediately," Stalin said.
PMK leader Anbumani Ramadoss also said that following the revolt of MLAs the Palaniswami government should prove its majority.