Mwai Kibaki, Former President of Kenya, Dies at 90

He came to pow­er promis­ing to root out cor­rup­tion and improve gov­ern­ment trans­paren­cy. But his tenure was blight­ed by wide­spread graft and a vio­lent upheaval. NAIROBI, Kenya — Mwai Kiba­ki, who helped trans­form Kenya’s econ­o­my and ush­er in a new Con­sti­tu­tion as its third pres­i­dent, but whose tenure was marred by high-pro­­file cor­rup­tion cas­es and…