Scott Brown swears to "support and defend the Constitution" thereby Senator Scott Brown

At the beginning of a new term of office, senators-elect take their oath of office from the presiding officer in an open session of the Senate before they can begin to perform their legislative activities. From the earliest days, the senator-elect—both the freshman and the
returning veteran—has been escorted down the aisle by another senator to take the oath from the presiding officer. Customarily, the other senator from the senator-elect's state performs that ritual.