Who are the members of the US senate?

The presiding officer sits in a chair in the front of the Senate chamber. The powers of the presiding officer are extremely limited; he primarily acts as the Senate's mouthpiece, performing duties such as announcing the results of votes. The Senate's presiding officer controls debates by calling on members to speak; the rules of the Senate, however, compel him to recognize the first senator who rises. The presiding officer may rule on any "point of order" (a senator's objection that a rule has been breached), but the decision is subject to appeal to the whole house. Thus, the powers of the presiding officer of the senate are far less extensive than those of the Speaker of the House.