Kentucky's secretary of state certified Rep. Ben Chandler (D-Ky.) the winner of a close reelection contest Friday, but Republican Andy Barr has already requested a recanvass of the results and has not yet conceded.

Chandler's margin stands at just 649 votes, but the recanvass appears unlikely to change the result. 

The process is different than a re-count — the recanvass is simply another check of the vote totals already reported. It's set to take place Nov. 12. 

Chandler claimed victory Friday in a message to supporters, saying, "It is your support and hard work that helped us win the battle. I am humbled and honored that the people of Central Kentucky have again chosen me to be their voice in Congress."