Mr Odinga, who spoke in Nyahururu, said this was one way that Azimio could ensure that they will bag the seat in the August 9 polls.
“I will take Mr Mwaniki and work with him at the national level, while we leave Mr Njenga to contest the senatorial seat here in Laikipia,” Mr Odinga told the supporters of the two in Nyahururu town.
Mr Odinga said the coalition wants to deny their rivals in Kenya Kwanza a chance to win more seats.
“If we don't engage our constituent parties in the coalition to prevail on their candidates to step down in favour of popular candidates, then we might give our opponents a chance of sweeping more seats,” said Mr Odinga.
He pleaded with voters to only elect leaders affiliated to the Azimio coalition.
“Save me from trouble and give me people I can work with when we form the next government. Elect leaders who are allied to Azimio from governor, senator, MP, woman rep to MCAs because if you don’t do that I will have a hard time delivering my promises to you,” he said.
Mr Njenga will now face off against Mr John Kinyua, who is defending his seat on a UDA ticket.
Others include businessman John Kiama (TSP), Robert Ndung’u (ANC), Henry Kimani of Chama Cha Kazi and independent candidates Steve Chege and Jackson Thengei.