Which is just nonsense like Ruto made Uhuru or Babu made Kibaki. You push someone ahead because they are the opportune candidate - which is in fact in your own best interest - cause you're unsellable or ill-disposed.
Despite the NYS stench Waiguru is more polished, pleasant and open contrasted to the bitter, quarrelsome Ngirici. She more vindictive than Karua. If she is so great why back someone else? No degree all the way since 2010... Babu Yao and Sonko already got it. If anyone "made" Waiguru it would be Uhuru. National podium. Nobody outside Kirinyaga knew Ngirici before the elections.
The fallout was way back after Jubilee primaries but
before the general elections. She started her tantrums way back. It's why Waiguru beat Karua by a thinner margin compared to the primaries 90% rout and the chopperborne one-horse race Woman Rep.
They fell out just immediately after the election in August 2017. Attempts to reconcile them didn't work. Ngirici felt she made Waiguru.
Ngirici fell out with Waiguru after Jubilee primaries and backed Karua - lost badly. I can fish the link. How about running for senator? don't need degree for that.