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President Donald Trump speaks during a meeting about the Supreme Court at the White House in Washington, D.C., Feb. 9, 2017. REUTERS/Kevin Lamarque

A review of the 2016 vote by the Michigan Bureau of Elections found that 31 people in the state appeared to have voted twice, according to a report released Thursday. The 31 people seemingly voted once in person and once with an absentee ballot.

The 31 cases were expected to be sent to the state's attorney general for review. "It's a very small number, statewide," State Bureau of Elections Director Chris Thomas told Michigan lawmakers, according to WWJ in Detroit. "It didn't swing any statewide election, but we do have recommendations in there on how to stop that, absolutely."

The state also conducted an audit of voting in Detroit. In examining 136 precincts across the city, it found that there were 216 questionable votes, which could be attributed to performance at polling places.

"We have not found pervasive fraud," Thomas said. "We have found performance issues."

The state's review is ongoing and it said, moving forward, it will focus on training workers in Detroit to avoid issues in the future.

"The city of Detroit and the entire state have made progress in election administration in recent years, but this audit highlights key areas in need of improvement," Michigan Secretary of State Ruth Johnson said in a statement. "I have directed Bureau of Elections staff to assist city election officials in making needed changes to poll worker training and recruitment efforts. Voters in Detroit and across Michigan deserve no less."

President Donald Trump, who won in the 2016 election over Democratic nominee Hillary Clinton, has regularly claimed there was massive voter fraud — some three to five million illegal votes —despite a lack of evidence. Trump lost the popular vote to Clinton by about 2.87 million votes. He won the swing state of Michigan by some 10,700 votes.

The president told Fox's Bill O'Reilly that Vice President Mike Pence would head up a commission to examine the vote "very, very carefully."

"Many people have come out and said I am right," Trump said. "We can be babies, but you take a look at the registration, you have illegals, you have dead people you have this, it's really a bad situation, it’s really bad."