Barr echoes Trump's concerns about mail-in voting, says it could 'open the floodgates of potential fraud'

Attorney General William BarrBill BarrWant to evaluate Donald Trump's judgment? Listen to Donald Trump Trump: Washington/Lincoln ticket would have had hard time beating me before pandemic Trump says Barr 'never' told him he thought he'd lose election MORE echoed concerns from President TrumpDonald TrumpRonny Jackson, former White House doctor, predicts Biden will resign McCarthy: Pelosi appointing members of Jan. 6 panel who share 'pre-conceived narrative' Kinzinger denounces 'lies and conspiracy theories' while accepting spot on Jan. 6 panel MORE over mail-in voting, saying the method could be particularly susceptible to fraud.

"The thing we have going for us, especially when there's intense division in the country, is that we have peaceful transfers of power and a way of resolving it is to have an election," Barr said in an interview that will air this Sunday on Fox News' "Sunday Morning Futures" with anchor Maria BartiromoMaria Sara BartiromoGraham says he'd 'leave town' to stop .5T spending plan The Memo: Trump pours gas on tribalism with Jan. 6 rewrite Trump: Tech giants 'immune from so many different things, but they're not immune from the lawsuit' MORE

"But when state governments start adopting these practices like mail-in ballots, that open the floodgates of potential fraud, then people's confidence in the outcome of the election is going to be undermined," he added.

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The remarks echoed comments from Trump, who has warned without evidence that mail-in voting will harm Republicans and lead to widespread fraud.

“MAIL-IN VOTING WILL LEAD TO MASSIVE FRAUD AND ABUSE. IT WILL ALSO LEAD TO THE END OF OUR GREAT REPUBLICAN PARTY. WE CAN NEVER LET THIS TRAGEDY BEFALL OUR NATION,” Trump tweeted last month. 

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Experts have said that fraud is slightly more common among mail-in ballots than other forms of voting, but widespread fraud is not an issue among all formats of voting.

Michigan, Ohio, Wisconsin and Connecticut are all sending voters absentee ballot applications, and New Hampshire and Massachusetts have eased requirements for absentee voting. California Gov. Gavin NewsomGavin NewsomJudge clears way for Larry Elder to appear on California recall ballot Caitlyn Jenner pledges to support Trump if he makes another bid for the White House Harris says she will campaign for Newsom in California recall election MORE (D) also signed an executive order Friday to send every registered voter in California a mail-in ballot. 

The debate over voting by mail has been heightened after several primaries were marred by long lines and crowded polling stations, raising health concerns during the coronavirus outbreak.