The lieutenant governor also serves as the president of the Oklahoma Senate, and may cast a vote to break ties in that chamber.

The authors of the Oklahoma Constitution placed the lieutenant governor as the ex officio president of the Oklahoma Senate, giving the office limited legislative power that included a tie-breaking vote.

[6] Lieutenant Governor Martin E. Trapp went on to succeed Governor Jack C. Walton, who was suspended on October 23, 1923, and convicted of impeachment charges and removed from office on November 19, 1923.

This presents a chance that they may represent different political parties, as was the case from 2003 to 2007 when Democratic governor Brad Henry and Republican lieutenant governor Mary Fallin were in office.

As originally written, the Oklahoma Constitution placed no limits on the number of terms an individual could serve as lieutenant governor.

George Nigh also held the lieutenant governorship from 1959 to 1963 and again from 1967 to 1979, and Republican Mary Fallin held the lieutenant governorship for 12 years from 1995 to 2007 with strict lifetime term limits limiting statewide officeholders to two four-year terms, it's unlikely that anyone will surpass these records barring a change in the state constitution.

, do solemnly swear (or affirm) that I will support, obey, and defend the Constitution of the United States, and the Constitution of the State of Oklahoma, and that I will not, knowingly, receive, directly or indirectly, any money or other valuable thing, for the performance or nonperformance of any act or duty pertaining to my office, other than the compensation allowed by law; I further swear (or affirm) that I will faithfully discharge my duties as Lieutenant Governor of Oklahoma to the best of my ability."

As state senate president, the lieutenant governor oversees procedural matters and may cast a vote in the event of a tie.

Despite the lieutenant governor's legislative role, his or her main function lies in the executive branch as the immediate successor to the governorship in the event of a vacancy.

This can be seen when Governor Frank Keating appointed Mary Fallin to serve as his Small Business Advocate within his Cabinet.