Democrat Curt Thompson, who finished third in the primary race for chair of the Gwinnett County Commission, has requested a recount.

Thompson finished 20 votes behind Lee Thompson Jr. The second-place finisher will face Nicole Love Hendrickson in an August runoff. She had more than 49% of the vote, but did not get enough votes to win outright.

Curt Thompson said he chose to request a recount because of the number of hand-marked ballots and problems on election day.

“A 20-vote margin is worth looking at,” he said.

Thompson was not the only candidate eligible to ask for a recount. Candidates have until Tuesday afternoon to request recounts.