According to Wamatangi, the decision to decamp from President Uhuru's camp was arrived at after intensive consultations between him and the electorate.
" Mimi niko hapa kwa sababu niko mahali nafaa kuwa. Nimeshauriana na wamama kule sokoni, wazee kule manyumbani, vijana na kazi zao za bodaboda mpaka na familia yangu na wote wameniambia ya kwamba kutoka hapa kuenda mbele fom ni UDA," he amid cheers from the crowd.
Similarly, Former Kiambu Governor William Kabogo and Gatandu South MP Moses Kuria who were also in attendance, declared their support for DP Ruto in the presidential race.
"Wacheni niwaonyeshe mchana mahali mimi kura yangu nitaweka, rais wa tano naomba uje hapa," he said calling DP Ruto to the front stage.
Senator Wamatangi ,Kabogo and Kuria will have to battle it out for the Kiambu gubernatorial seat alongside a host of other politicians who have also declared interest, in unseating incumbent James Nyoro.
Others include County Assembly Speaker Stephen Ndichu, Thika MP Wainaina Jungle as well as former governor Ferdinand Waititu.