In practice, neither the Vice President nor the President pro tempore — customarily the most senior ( longest-serving ) Senator in the majority party — actually presides over the Senate on a daily basis ; that task is given to junior Senators of the majority party, in part so they may learn proper procedure.

In practice, neither the Vice President nor the President pro tempore usually presides ; instead, the duty of presiding officer is rotated among junior senators of the majority party to give them experience in parliamentary procedure.

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