James Clark "Jim" Nance was a leader for 40 years in the Oklahoma Legislature in the U.S. state of Oklahoma and was community newspaper chain publisher 66 years. Nance served as Speaker of the Oklahoma House of Representatives and President pro tempore of the Oklahoma Senate. During his legislative career, Nance wrote the "Honest Mistake" law which became a model for other states. Nance then became a key sponsor and Legislative Chairman of the U.S. Uniform Law Commission (ULC), sponsored by the National Conference of Commissioners on Uniform State Laws, a non-partisan advisory panel which drafted uniform acts and uniform state commerce laws. Nance became known as a legislative expert in a 40-year legislative career as one of two Oklahomans to hold the top posts in both chambers of the Oklahoma Legislature. The state's largest newspaper, The Daily Oklahoman wrote he was the "longest serving Oklahoma Legislator" and "A Legislator's Legislator." Nance, a Democrat, is the only Oklahoma House Speaker elected through a bipartisan coalition of Democrats and Republicans. Fiercely independent, Nance considered public policy work to be a service and did not ever accept a salary or pension for any of his 40 years in the legislature and 24 years on the Uniform Law Commission. Nance refused to work as a lobbyist, although he had many offers after leaving office.

The Legislature of the State of Oklahoma is the state legislative branch of the U.S. state of Oklahoma. The Oklahoma House of Representatives and Oklahoma Senate are the two houses that make up the bicameral state legislature. There are 101 state representatives, each serving a two-year term, and 48 state senators, who serve four-year terms that are staggered so only half of the Oklahoma Senate districts are eligible in each election cycle. Legislators are elected directly by the people from single member districts of equal population. The Oklahoma Legislature meets annually in the Oklahoma State Capitol in Oklahoma City.