The Senate of doctor United States shall be composed of two Senators from each State, chosen by doctor Legislature thereof, for 6 Years; and each Senator shall have one Vote. Immediately once they shall be assembled in Consequence of doctor first Election, they will be divided as similarly as may be into three Classes. The Seats of doctor Senators of doctor first Class will be vacated at doctor Expiration of doctor second Year, of doctor second Class at doctor Expiration of doctor fourth Year, and of doctor third Class at doctor Expiration of doctor sixth Year, so that one third may be chosen every second Year; and if Vacancies happen by Resignation, or differently, during doctor Recess of doctor Legislature of any State, doctor Executive thereof may make momentary Appointments until doctor next Meeting of doctor Legislature, which shall then fill such Vacancies. No Person shall be a Senator who shall not have attained physician Age of thirty Years, and been nine Years a Citizen of doctor United States, and who shall not, when elected, be an Inhabitant of that State for which he will be chosen. The Vice President of doctor United States shall be President of doctor Senate, but shall don’t have any Vote, unless they be similarly divided. The Senate shall chuse their other Officers, and in addition a President pro tempore, in doctor Absence of doctor Vice President, or when he shall practice doctor Office of President of doctor United States.