According to npr:

Kentucky Republican Gov. Matt Bevin is formally asking for a recanvass of Tuesday’s gubernatorial election, in which vote totals show Democratic Attorney General Andy Beshear ahead by just over 5,000 votes. A recanvass is a double-checking of the vote totals and rarely produces different results.

In a statement, Bevin’s campaign manager said: “The people of Kentucky deserve a fair and honest election. With reports of irregularities, we are exercising the right to ensure that every lawful vote was counted.”

Bevin and his campaign have provided no details about election irregularities that they say took place during the race.

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