Sen. Bernie Sanders is requesting a recanvass of the vote in the wake of the tight finish in last week’s Kentucky Democratic presidential primary.

Sanders’ campaign sent a signed letter Tuesday to Kentucky Secretary of State Alison Lundergan Grimes, requesting “a full check and recanvass of every one of the voting machines and absentee ballots.”

Clinton appeared to narrowly win the contest last week by less than a percentage point.

“My office is notifying all county boards of elections that Sen. Sanders has requested a recanvass, and we are reminding them of the laws and procedures to be followed,” Grimes said in a statement upon receiving the request.

Sanders has been criticized for staying in the race despite the overwhelming odds against his overtaking Clinton in the delegate count. Indeed, Grimes’ news release noted the last recount came in the states’ Republican gubernatorial primary and did not lead to a change in the results. The margin in that race was only 83 votes.

Grimes also tweeted that the county boards of elections would convene Thursday morning.

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