 At the beginning of each session, the Senate elects one member to serve as the President pro tempore when the Lieutenant Governor is absent or that office becomes vacant.A different member of the Senate (usually a senior member, but unlike in some bodies, it is not based on seniority) is elected at the end of the session to serve as President pro tempore during the interim when the Legislature is not in session.Unlike his counterparts in other state senates, the president pro tempore does not preside over the chamber on a daily basis; Texas's Lieutenant Governor regularly exercises his constitutional post as president of the state senate.