James Lankford leads T.W. Shannon by 8 points ahead of Tuesday but he's below 50 percent.
Two new ads for state Rep. T.W. Shannon are a last push for support before Tuesday.
They're touting T.W. Shannon as part of a “new generation of conservative leaders.”
A group backing T.W. Shannon is attacking Rep. James Lankford for voting to raise debt limit.
A survey from a pro-Shannon group shows him up 10 points over Rep. James Lankford (R-Okla.).
The Texas senator threw his support to Oklahoma Senate candidate T.W. Shannon.
The nod could give him a boost with social conservatives in his Senate primary.
A GOP survey for a group backing Oklahoma House Speaker T.W. Shannon in the Senate Republican...
Randy Brogdon will drop his primary challenge to the Okla. gov. and make a bid for Senate.
Rep. James Lankford (R-Okla.) leads a pack of other Republicans in the poll.
Republican T.W. Shannon began his Senate campaign with a three-city state tour video.
T.W. Shannon is forming an exploratory committee to succeed Coburn, sources tell The Hill.
Cruz appears in an ad for conservative T.W. Shannon (R) in the Oklahoma Senate Republican primary.
Rep. James Lankford is facing off against T.W. Shannon in the Oklahoma Senate primary.
National conservatives still see hope for an upset victory in the Senate race.
Former Oklahoma Speaker T.W. Shannon is in a tight race against Rep. James Lankford.
He's quickly become the anti-establishment GOP favorite over Rep. James Lankford (R-Okla.).
Polling, endorsements have opponent's team in Oklahoma Senate race concerned, insider says.
Oklahoma House Speaker T.W. Shannon (R) picked up a major conservative endorsement in his bid for...
Francis Rooney, a Romney donor and Bush bundler, is eyeing competitive GOP primaries.
The GOP Senate hopeful talks about his religious values and vision for the country.
Unhappy with their choices, Tea Party activists want Randy Brogdon to run for Senate instead.
Oklahoma House Speaker T.W. Shannon will announce his senate campaign on Wednesday.
Rep. Jim Bridenstine’s (R-Okla.) campaign said he won't rush a decision.