who is the presiding officer of the senate when the vice president is not there
Presiding Officer of the United States Senate The U.S. Constitution also provides for appointment of one of the elected Senators to serve as President pro tempore. This Senator presides when the vice president was absent from the body. The President pro tempore is selected by the body specifically for the role of presiding in the absence of (as the meaning of pro tempore, literally "for the time being") the actual presiding officer. By tradition, the title of President pro tempore has come to be given more-or-less automatically to the most senior senator of the majority party. In actual practice in the modern Senate, the President pro tempore also does not often serve in the role (though it is his or her constitutional right to do so), instead, as governed by the aforementioned Rule I, he or she frequently designates a junior senator to perform the function.
United States House of Representatives The United States House of Representatives is the lower chamber of the United States Congress. The Senate is the upper chamber. Together they compose the legislature of the United States.
United States Secretary of Labor Alexander Acosta is the current U.S. Secretary of Labor since April 28, 2017.
Special session In the United States of America, Article II, Section 3 of the United States Constitution gives the President of the United States the power to "on extraordinary occasions, convene both Houses or either of them." [1]