@mcdoba, I think all is not lost. Tinga just needs to re-launch his campaign and base it on another platform but not being reformist. Only die hard supporters, and sycophants would believe this and his opponents would capitalize on that to remind him of Miguna's claims.
He could, for instance capitalise on his populist approach to politics. He could borrow a leaf from ikwete 'the listening caring financial partner' to maybe 'the listening, responsive President'. There are so many Kenyans who are missing Moi-style politics.