Leonard is the son of senior federal judge Tim Leonard. His father-in-law is former Gov. Frank Keating. He previously worked as a prosecutor in Cleveland County.
Pruitt has served as a state senator and unsuccessfully ran for Congress and lieutenant governor. He had the backing of former Arkansas Gov. Mike Huckabee, who announced his support in a Twitter posting Monday.
For the past 16 years, Drew Edmondson has been attorney general. He did not seek re-election so he could run for the Democratic nomination for governor. Oklahoma has only had one Republican attorney general since statehood — G.T. Blankenship began his term in 1967.