The movement, which is on a mobilisation tour of Kisii and Nyamira counties, criticised Ruto's administration over human rights, governance and the economy.
Its leaders also dismissed the government's recently announced Sh2 billion compensation package for victims of human rights abuses, arguing that accountability should accompany compensation.
Speaking during a women's empowerment event in Mosocho, Kisii County, the leaders urged residents to support a united opposition, saying multiple candidates would increase Ruto's chances of re-election.
Nairobi Senator Edwin Sifuna said the movement would not support any arrangement that splits opposition votes.
"As Linda Mwananchi, we will not be used to split opposition votes. If there is anyone dreaming that Sifuna will be used to divide the opposition, then you are in for a rude shock," Sifuna said.
"We will not fail our country."
The movement's spokesperson and Suba South MP Caroli Omondi said consultations were ongoing with leaders seeking to form a united opposition.
"We shall bring together Gachagua, Kalonzo and Matiang'i so that we take over power next year," Caroli said.
"Kenya is now being ruled under Ruto's kakistocracy, a government led by unscrupulous people. We have a criminal enterprise called Kenya."
Siaya Governor James Orengo and Embakasi East MP Babu Owino also backed calls for a single opposition candidate, saying unity would strengthen the coalition's chances in the election.
Vihiga Senator Godfrey Osotsi claimed there were efforts to divide the movement.
"This Ruto administration is burning the midnight oil scheming how to split our team. I want to tell Ruto that as Linda Mwananchi we will remain united and send you home," Osotsi said.
Former Chief Justice David Maraga also joined the movement during the Mosocho event and urged Kenyans to unite behind one opposition candidate.
"Let us unite and remove this administration," Maraga said.
"I have been to 42 counties and Kenyans have told me they are tired. Our Constitution is no longer respected."
"They (Kenyans) have told me that I should engage my colleagues so that together we can liberate the country. Kenya is a very rich country and what is killing it is rampant corruption."
Others who joined the Kisii-Nyamira tour included Murang'a Governor Irungu Kang'ata, Kitutu Chache South MP Antony Kibagendi, Bomachoge Borabu MP Obadiah Barongo, Mavoko MP Patrick Kamau, Kisii Senator Richard Onyonka, Funyula MP Oundo Midenyo, Kabuchai MP Majimbo Kalasinga, Wundanyi MP Dan Mwashako, Kaiti MP Joshua Kimilu and former Law Society of Kenya president Faith Odhiambo.
Kang'ata described Linda Mwananchi as a national movement capable of uniting the country ahead of the 2027 General Election.
"The only political faction that is truly national is Linda Mwananchi, and that is an ideal our forefathers were unable to achieve since independence. We believe that in 2027 Linda Mwananchi will realise that dream of a united Kenya," Kang'ata said.
He urged Kenyans to support the movement, saying it was committed to national unity and democratic freedoms.
"Let us unite. Let us be one. We want every Kenyan to feel part of this movement. Ours is not a violent movement; we are simply exercising our democratic freedoms, and that is one of the areas where the government must improve. We must support democracy," Kang'ata said.
The Linda Mwananchi team said it would continue touring different parts of the country to mobilise support ahead of the 2027 General Election. It also held rallies in Kisii town, Keumbu and Keroka in Nyamira County.
