By Attahiru M. Jega, OFR Professor Department of Political science Bayero University, Kano, Nigeria.Keynote Address, presented at the International Conference on 20 Years of Democracy in Nigeria, with the Theme: Democracy and the Rule of Law [1999-2019], Organized by TELL Communications Limited, Wednesday, October 23, 2019, The Yar Adua Centre, Abuja. Introduction The challenge of…