President of the Senate (Australia)
The position is provided for by Section 17 of the Constitution of Australia. The Senate elects one of its members as president at the start of each new term, or whenever the position is vacant. This is usually—though not necessarily—a member of the party or coalition that holds the most seats in the Senate. The largest party in the Senate is not always the governing party, as government is determined by the House of Representatives. The President of the Senate and the Speaker of the House of Representatives may consequently be from different parties.
Senate of Nigeria
The President of the Senate is the presiding officer of the Senate, whose chief function is to guide and regulate the proceedings in the Senate. The Senate President is third in the Nigerian presidential line of succession. He is assisted by the Deputy President of the Senate. The current Senate President is Sen. Bukola Saraki and the current Deputy Senate President is Ike Ekweremadu both of the People's Democratic Party. The Senate President and his Deputy are also assisted by principal officers including the Majority Leader, Deputy Majority Leader, Minority Leader, Deputy Minority Leader, Chief Whip, Deputy Chief Whip, Minority Whip, and Deputy Minority Whip. In addition, there are 63 Standing Committees in the Senate chaired by Committee Chairmen.