NASA is banking on the more than 200 poll petitions filed in courts to boost its numerical strength in the Jubilee dominated bicameral Parliament.
A record 238 petitions for five elective seats have been filed to challenge the election of 34 governors, 15 senators, 12 woman representatives, 98 National Assembly members and 129 MCAs.
The law requires candidates dissatisfied with the outcome to file petitions within 28 days after declaration of results.
NASA co-principals Raila Odinga of ODM, Wiper's Kalonzo Musyoka, ANC's Musalia Mudavadi and Ford Kenya's Moses Wetang'ula are optimistic of success in the petitions to tilt numbers against President Uhuru Kenyatta's Jubilee Party.
The opposition has zeroed in on seats won by Jubilee in NASA strongholds and battlegrounds.
"The majority they are enjoying in Parliament is artificial, because rigging took place across the board. Uhuru is just wallowing in a kind of balloon, which is going to be pricked soon and the numbers are going to be adjusted accordingly," Raila said on Tuesday night in an interview with a local television.
Jubilee and its friendly parties has 213 members in the National Assembly, against NASA's 120 members.
Jubilee has 40 senators, while NASA has 27.
Raila and his co-principals have dismissed Uhuru's numbers in both Houses as 'computer generated' and wants the court to overturn their victories.
Uhuru has bragged that his dominance in the two Houses would be enough to initiate constitutional changes, if need be, without NASA's approval.
On Monday, Uhuru warned that Jubilee Party would impeach Raila within 90 days, if the opposition leader wins on October 17.
Raila has pointed out the high number of poll petitions clearly shows people's will was subverted through electronic manipulation of results.