President pro tempore of the Oklahoma Senate

Henry S. Johnston, of Perry, was sworn into office as the first president pro tempore on November 16, 1907, the same day Oklahoma was admitted U.S. state.[1] He served a single term and was replaced by J. C. Graham in 1909.[2]

For its first 60 years, no one person ever held the office for more than one term consecutively. Tom Anglin of Holdenville, Oklahoma, was the first to hold the office a second time, serving from 1923 to 1925 and again from 1943 to 1945.[2] Clem McSpadden was the first president pro tempore to serve two consecutive terms, from 1965 to 1969.[2]

From 1965 to 2006, ten state senators have been selected to serve as president pro tempore over the 41-year period that would have allowed for the election of 22 presidents pro tempore.[2] Of those ten, only James E. Hamilton of Poteau, Oklahoma, and Cal Hobson of Lexington, Oklahoma, served only one full single term.[2] Hamilton was an unsuccessful candidate for the United States Senate in 1980, and he eventually returned to politics as a state representative, where he chaired the appropriations committee. Hobson won reelection to the office of president pro tempore, but resigned shortly thereafter when the Oklahoma Senate Democratic Caucus voted to allow him to resign or be ousted due to alcohol abuse during the 2005 legislative session. After completing his treatment for alcoholism, Hobson sought unsuccessfully to be the Democratic nominee for Lieutenant Governor of Oklahoma in 2006.

Four presidents pro tempore have served two consecutive terms and two have served three consecutive terms. As of 2013, Stratton Taylor holds the record of four consecutive terms. Taylor held the office for eight years, 1995 to 2003, serving as the president pro tempore under the entire administration of Governor Frank Keating.[3]

Glenn Coffee was a co-president pro tempore as part of a power-sharing agreement and went on to become the state's first Republican president pro tempore

Following the 2006 elections, the number of state senators was split evenly between the two major political parties; there were 24 Democratic senators and 24 Republican senators.[4] The election of Democratic candidate Jari Askins as the Lieutenant Governor of Oklahoma, the ex officio President of the Senate, gave the Oklahoma Senate Democrats a single-vote majority.

The Oklahoma Constitution specifically states that only one state senator can be elected as president pro tempore. To address the historic tie, a power sharing agreement was reached that created the "co-president pro tempore." Under this agreement, Democratic State Senator Mike Morgan of Stillwater served as the president pro tempore of the Senate and Republican State Senator Glenn Coffee of Oklahoma City served as co-president pro tempore. Coffee switched places with Morgan for one month, July 2007, to symbolize the unity between the two parties. While Coffee held the office of president pro tempore in July, Morgan served as the co-president pro tempore.

Morgan and Coffee took turns presiding over the Oklahoma Senate and, under the agreement, Morgan only had appointment authority as long as Coffee assented to the appointment, effectively making them both fully vested with the duties and rights of president pro tempore. Additionally, under the agreement, should the Governor of Oklahoma and Lieutenant Governor of Oklahoma both have been absent from the state, Morgan would have served as the acting governor except for the one month of July, 2007.

Following the 2008 elections, the Republicans won control of the Senate for the first time in state history, with 26 Republicans and 22 Democrats. They selected Glenn Coffee to serve as the first full President pro tempore who served from 2009-2011 when he was term-limited out and was selected to serve as Secretary of State in Governor Mary Fallin's administration. Brian Bingman served as President pro tempore from 2011 to 2017, and was succeeded by the current President Pro Tempore, Mike Schulz in 2017.