What is senate president of nigeria?

As an AI language model, I don't have access to the latest data, but as of 2021, the Senate President of Nigeria is Ahmed Ibrahim Lawan. He was elected to the position on June 11, 2019, and represents the Yobe North constituency in the National Assembly. Lawan succeeded Bukola Saraki, who served as Senate President from 2015 to 2019. Prior to becoming Senate President, Lawan had served as the Senate Majority Leader. As Senate President, Lawan is responsible for presiding over the Senate's sessions, maintaining order and decorum in the chamber, and representing the Senate in official functions.