With less than a week remaining before South Carolina Republicans choose their gubernatorial nominee, Attorney General Alan Wilson appears to be gaining significant momentum in his runoff battle against Lt. Gov. Pamela Evette, according to a new survey.

A new NPA Polling survey found him leading Evette 52% to 36% among likely Republican runoff voters, with 13% still undecided.

The poll also found Wilson's support to be more firmly consolidated, with 38% of his backers describing themselves as "definitely" voting for him compared to 23% of Evette supporters who said the same.

The findings represent the second consecutive runoff survey showing Wilson with an advantage.

Wilson has consolidated support from voters who backed former rivals Rep. Ralph Norman, Rom Reddy, and Rep. Nancy Mace.

Mace and Norman have publicly endorsed Wilson.

Wilson's growing lead comes despite an aggressive wave of negative advertising from Evette's campaign attacking his record as attorney general.

At the same time, some strategists believe Evette's effort to tie Wilson to criticism of the Iran memorandum of understanding by Sen. Ted Cruz is backfiring among conservative voters.

Evette recently criticized Wilson for accepting Cruz's endorsement after the Texas senator questioned aspects of President Trump's controversial Iran agreement.

The agreement calls for $300 billion for Iran and billions more in sanctions relief.

Many conservatives have joined Cruz in opposing the MOU.

Wilson, however, has continued to praise Cruz as a principled conservative voice.

On Tuesday Wilson and Evette appeared in a televised debate and found common ground on issues such as eliminating South Carolina's income tax, expanding school choice, and exploring tightly regulated medical marijuana legislation.

But one of the most notable clashes involved a proposed casino development in the state.

Evette has not opposed casino gambling.

Wilson slammed Evette for backing the casino proposal on the statewide ballot and for receiving big money being funneled to her campaign to do so.

"I'm sure that there are people out here who used to support me, who are very pro-casino, who are going to be doubling down and funneling lots of money to negative commercials against me this week," Wilson said.

"But at the end of the day, I made it abundantly clear that I have serious concerns about casinos in South Carolina."

With early voting underway and Election Day set for June 23, Wilson enters the campaign's final days with measurable momentum, a growing coalition of conservative support, and polling that suggests he has become the favorite to capture the Republican nomination.

John Gizzi is chief political columnist and White House correspondent for Newsmax. For more of his reports, Go Here Now.