An voter drops off her ballot at the Board of Elections in Dayton, Ohio on Wednesday. The state changed primary voting to a vote-by-mail system to reduce chances of the coronavirus spread. Photo: Megan Jelinger/AFP via Getty Images

The vast majority of Americans support universal access to mail voting and over half believe all elections should be conducted via mail, a Pew poll published Tuesday shows.

Driving the news: There's a bipartisan concern among the 4,917 people Pew surveyed this month that the novel coronavirus pandemic will disrupt November's elections. President Trump has questioned the reliability of mail-in ballots, but several states have elected to expand mail-in voting for 2020 primaries. 49% of Republicans Pew polled now favor allowing any voter to vote by mail if they want to.

By the numbers: The poll, which has a margin of error of plus or minus 2.1 percentage points, found 70% of Americans support absentee voting as an option and support conducting all elections by mail stands at 52% — up from 34% in 2018.

  • 51% of Republicans are against allowing all voters to cast their ballots by mail, while 87% of Democrats back the measure — and 63% of Democratic voters are strongly in favor of the measure.
  • 69% of those polled back automatic voter registration, with 84% of Democrats and 53% of Republicans supporting the option.

Of note: Trump requested a mail-in absentee ballot in March to vote in Florida’s Republican presidential primary, be he called the voting method this month "dangerous."

  • Studies show all forms of voter fraud are rare, and an April Stanford University study found the introduction of mail-in voting did not have an effect, on average, on the share of voter turnout for either Republicans or Democrats. 
  • Former Vice President Joe Biden won Ohio's Democratic primary on Tuesday, but the state's mail-in system showed voter turnout as dwindling typical numbers, according to AP.

Go deeper: The race to change how America votes

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House Democrats call postmaster general to testify on USPS changes under Trump

The LeDroit Park post office in Washington, D.C. on May 28. Photo: Tom Williams/CQ-Roll Call, Inc via Getty Images

The House Oversight Committee has asked Postmaster General Louis DeJoy, appointed by President Trump in May, to testify on Sept. 17 on changes made to the U.S. Postal Service under the Trump administration.

Why it matters: USPS mail has seen days of backlogs and delays after DeJoy, a former fundraiser for Trump and the Republican National Committee, enacted new cost-cutting procedures that took effect in mid-July, the Washington Post reports.

Nevada governor signs mail-in voting bill after Trump threatens lawsuit

Nevada Gov. Steve Sisolak at a February event in Las Vegas. Photo: Alex Wong/Getty Images

Nevada Gov. Steve Sisolak (D) announced Monday evening that he's signed a bill enabling all registered voters in the state to vote by mail in November's elections.

Why it matters: President Trump told reporters Monday he'd sue Nevada in a bid to stop the mail-in measure. After Sisolak's announcement, Trump retweeted his earlier tweet stating: "In an illegal late night coup, Nevada's clubhouse Governor made it impossible for Republicans to win the state. Post Office could never handle the Traffic of Mail-In Votes without preparation. Using Covid to steal the state. See you in Court!"

Go deeper: Trump stokes fears of election-night mail voting fraud

The 2020 voter registration race

Photo: Brendan Smialowski/AFP via Getty Images

The Trump campaign and RNC have now registered 100,000 new voters in the 2020 cycle, more than doubling their numbers from 2016, according to new Trump Victory data provided exclusively to Axios.

Yes, but: Democrats are still registering new voters in key battleground states.