Republican incumbent: James Inhofe
Democratic candidate: Andrew Rice
Inhofe, 73, has represented Oklahoma in the U.S. Senate since 1994. He had been in the U.S. House from 1987 to 1994. He previously served as a mayor and state legislator.
Rice, 35, has been a state senator since 2006.
According to Real Clear Politics, polls show Inhofe in the lead, with the latest poll indicating a margin of 9%, which is down from the previous polls. That same website offers this analysis of the latest poll.
Both Oklahoma Senate seats have been in Republican hands since Inhofe entered the Senate in 1994. However, Democrats have had more success in gubernatorial elections, including wins by Democrat Brad Henry in 2002 and 2006. In presidential elections since 1952, the only Democrat to carry Oklahoma was Lyndon Johnson in 1964.
While a Democratic upset cannot be ruled out, Inhofe seems reasonably safe.