Herschel Walker, the Republican Senate candidate in Georgia, is holding a lead against Democratic senator Raphael Warnock, according to a poll by Emerson College on Tuesday.

Forty-six percent of very likely Georgia voters said they plan to vote for Walker, while 44 percent said they would back Warnock and 7 percent were undecided. The last Emerson poll in April showed Walker with a 4-point lead, indicating a minor tightening of the race, with Walker still maintaining an edge within the margin of error.

The Emerson survey follows a month of data from other pollsters that found Warnock with a small but consistent lead over the former NFL star. Walker is currently trailing Warnock by 3.3 points in the Real Clear Politics polling average.

Walker’s advantage is most prominent among rural and suburban voters, according to Emerson.