Woodward, Okla. —
Lankford declined to say how much he currently has raised, but the next campaign finance report is due next week.
On Sunday, Attorney General Scott Pruitt and U.S. Rep. Tom Cole, R-Okla., both said they would not run for Coburn's seat. Gov. Mary Fallin also has said she won't run for the seat.
The timing of the special election means most officeholders who run for the seat, including Lankford, will not be able to run for re-election to their current positions. His announcement is expected to trigger another wave of candidates seeking to replace him in the 5th District. Former state Rep. Shane Jett already has said he plans to run. Other Republicans considering the race for Lankford's seat include Corporation Commissioner Patrice Douglas; state Sens. Clark Jolley, Greg Treat and David Holt; former state Sen. Steve Russell; and state Rep. Paul Wesselhoft.
Lankford said Monday he has no plans to endorse a candidate in the primary race for his open seat.
"I'll stay out of it," he said.
On the Democratic side, retired University of Central Oklahoma professor Tom Guild, who ran unsuccessfully for the post in 2010 and 2012, already has announced his plans to run again for the 5th District in 2014, and former Corporation Commissioner Jim Roth said he's considering the race.