Mwangi wa Iria is among the few governors in Central region who will be flying Jubilee's flag in the August 8 general elections.
The incumbent garnered 205,941 votes in the Jubilee primaries, while his nemesis Kigumo MP Jamleck Kamau came second with 118,274.
In the Senate seat, Kiharu MP Irungu Kang'ata beat incumbent Kembi Gitura with 158,167 votes. Kembi received 146,207 votes.
Current woman rep Sabina Chege will also defend her post with a Jubilee ticket after winning with 211,639 votes.
In second place was former presenter Waithira Muithirania with 99,708 votes, while Catherine Wanjiku alias Mama Sacco garnered 16,772 votes.
In the MP seats, Kandara MP Alice Wahome successfully clinched the Jubilee ticket on Wednesday.
A majority of incumbents have been voted out in the Jubilee primaries, which has put pollsters on the spot.
Among the first was Kiambu Governor William Kabogo who conceded an early defeat against Starehe MP Ferdinand Waititu.
Waititu went on to take the ticket with more than 300,000 votes against Kabogo's over 60,000.