The free-for-all in the GOP primary to succeed retiring U.S. Rep. Phil Roe (R-Johnson City) in the 1st Congressional District is reaching its final hours.

A poll commissioned by WJHL-TV indicates a tight race. The survey conducted by Spry Strategies has the race as:

• Rusty Crowe: 16.1%
• Diana Harshbarger: 15.8%
• Josh Gapp: 11.7%
• Timothy Hill: 10.4%
• Steve Darden: 9.3%
• John Clark: 8.9%
• David Hawk: 6%

The poll of 665 likely voters has a margin of error of plus or minus 4.5 percentage points.

The Club for Growth has been advertising heavily in support of state Rep. Timothy Hill of Blountville while also attacking Kingsport pharmacist Diana Harshbarger, state Sen. Rusty Crowe of Johnson City, and Knoxville dermatologist Josh Gapp. A Club for Growth poll had Hill leading the race, with Harshbarger and Crowe within the margin of error.

Harshbarger has her own ads out attacking Hill, Crowe and former mayors Clark of Kingsport and Darden of Johnson City.

“I try to love all God’s creatures, but I’m sorry, I just hate snakes,” Harshbarger says in one ad. “And if you release a snake in the swamp, it’s never coming back.”

Crowe has his own spots out, highlighting his affable nature as a contrast to the attacks going on all around him.

“As a veteran, I know when you’re taking fire you’re over the target,” Crowe says in the spot. “And the Washington, D.C., swamp is firing on me.”

“Ignore the attacks and join my fight to give D.C. a good ole’ dose of Tennessee,” he says.

Gapp, who lives outside the district boundaries, has poured $1.2 million of his own money into his bid. His ad includes images of the candidate wandering through a set tipping over a Planned Parenthood sign, wielding an AR-15 rifle, and pledging to let Nancy Pelosi know that “in Tennessee we celebrate Easter, Christmas, our flag, our national anthem, and we always will.”