The Wiper leader, Stephen Kalonzo, on Monday, accused the Jubilee Party of having stolen their victory in the last election.
The former vice president was among the NASA three who had on Monday pitched camp in Kitui West to campaign for Wiper candidate Edith Nyenze.
The Nasa principals drummed support for the widow of the former Kitui West MP, the late Francis Nyenze, in three campaign rallies ahead of the 26th March by-election.
Speaking at Kathivo market in Kitui West, Mr. Kalonzo reminded Jubilee of their stolen victory in the last year's August general election.
"We haven't forgotten that our victory was stolen by Jubilee last year," Mr. Kalonzo said.
With regard to the stealing of elections in the country, the Wiper leader promised Nasa supporters that the Nasa coalition is still intact and will fight for electoral justice and ensure that it's dealt with once and for all.
"Our main focus is to ensure that issues of electoral injustice are dealt with once and for all," Mr. Kalonzo promised.
He furthermore confirmed to the Nasa supporters that Nasa is there to stay and will not die.
"We have invested a lot in Nasa. We, therefore, cannot allow the coalition to die," the former vice president assured supporters.