Kamba leaders on Tuesday threw their weight behind Wiper Party Leader Kalonzo Musyoka’s bid to be endorsed as Nasa flag bearer.
They said they had united as one community and will be pushing to have Mr Musyoka on the ballot.
Former Cabinet Secretary Charity Ngilu said she had lost elections all the time she was opposing Mr Musyoka and did not want a repeat of the same.
"I opposed him in 2007 and lost and again in 2013. This is not going to happen again,” She said.
She also apologised to the community saying that in 2013 she cost the Cord coalition the presidency by campaigning for Jubilee.
Makueni governor Kivutha Kibwana said Mr Musyoka was the best candidate to fly the presidential flag.
"Ask us to even go and talk to the other Co-principals so we can tell them this, because you are the one to save Kenya," he said.
Senator Mutual Kilonzo said its only 30 days left before Nasa announces their presidential candidate and they will fast and pray until Mr Musyoka is chosen.