He announced the formation of the party at a convention, which was attended by former legislators Antony Raju and K C Joseph, among others.
Francis George, son of K M George who founded Kerala Congress in 1964, was elected as the chairman of the Janadhipathya Kerala Congress at its first steering committee meeting presided over by Joseph.
A state convention of the party will be held at Kottayam on March 16 in which the structure of the party is expected to be evolved.
"How can we agree with a leadership which held secret meetings with the BJP central leaders by violating all declared democratic principles of the Kerala Congress? No Kerala Congress worker can agree with such a move. Such things are happening at a time when minorities and Dalits are targeted across the country at the behest of ruling dispensation," he said.
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Earlier, addressing a programme organised by the Press Club Ernakulam, Francis George said that the Mani-headed Kerala Congress(M) was a "dried up well".
"Kerala Congress (M) is a dried up well....It will become empty very soon," he said.
Responding to Mani group's charge that leaders and workers of Francis George-led party would end up on the streets, he said "time will prove who would be dumped on the wayside".
Kerala Congress (M) and more people would quit the party and join his formation to fight against "corruption, nepotism and anti-farmer policies" of Centre and state governments.
He said his party wished to be associated with progressive, secular, Left parties in the Assembly polls and initial round of discussions were held with senior leaders of CPI(M) in this regard.
"Formal discussions will be held with the Left leaders after the party's Kottayam convention," he said.
Francis George enjoys considerable clout among followers of Syrian Catholic Church in three districts including Idukki, Ernakulam and Kottayam.