Michigan Republican Terri Lynn Land is rebutting a new poll that showed Rep. Gary Peters opening up a lead of six percentage points in their battle for an open Senate seat.

Epic MRA, a firm that represents a host of Democrats and Democratic-friendly clients, showed Peters leading Land 45 percent to 39 percent, in a poll of 600 likely voters conducted Aug. 22-25. It had an error margin of 4 percentage points.