As the vitriol among Republican contenders for Georgia’s open U.S. Senate seat intensifies, the party’s heavyweights are taking behind-the-scenes steps to boost the eventual nominee amid concerns that the bruising contest could help a Democrat win the seat.

A conservative group last week launched a round of attack ads to try to define Democratic front-runner Michelle Nunn before she can do so herself. Republican groups are quietly raising millions of dollars to trumpet their nominee — and target Nunn. And party operatives hope to take advantage of a recent electoral change to boost voter turnout.

Complicating the efforts is the still-muddied GOP field that includes three sitting congressmen, a former Georgia secretary of state and an ex-Fortune 500 chief executive. With no clear front-runner, GOP leaders are already urging the party faithful to keep one eye on November as the May 20 primary and July 22 runoff loom.

Read the full story, and find out how Nunn and Democrats are seeking to counter the attacks, at myajc.com.