The Sanders campaign says it will ask the Kentucky secretary of state to have election officials review electronic voting machines and absentee ballots from last week's primary in each of the state's 120 counties.
Clinton holds 1,924-vote lead over Sanders out of 454,573 votes cast. The Associated Press had not called the race, despite Clinton's slight lead, in the event that Sanders might ask to recanvass the vote.
A recanvass is not a recount but a review of the voting totals.
Both Clinton and Sanders received 27 delegates, but one delegate remains to be allocated in a congressional district that includes Frankfort and Lexington.
