Photo: The Canadian Press

Vice President Mike Pence and his wife Karen cast their ballots in Indianapolis, Friday.

With eight days before Election Day in the United States, more people already have cast ballots in this year's presidential election than voted early or absentee in the 2016 race as the start of in-person early voting in big states led to a surge in turnout in recent days.

The opening of early voting locations in Florida, Texas and elsewhere has piled millions of new votes on top of the mail ballots arriving at election offices as voters try to avoid crowded places on Nov. 3 during the coronavirus pandemic.

The result is a total of 58.6 million ballots cast so far, more than the 58 million that The Associated Press logged as being cast through the mail or at in-person early voting sites in 2016.

Democrats have continued to dominate the initial balloting, but Republicans are narrowing the gap. GOP voters have begun to show up at early in-person voting, a sign that many heeded President Donald Trump's unfounded warnings about mail-voting fraud.

On Oct. 15, Democrats registrants cast 51% of all ballots reported, compared with 25% from Republicans. On Sunday, Democrats had a slightly smaller lead, 51% to 31%.

The early vote totals, reported by state and local election officials and tracked by the AP, are an imperfect indicator of which party may be leading. The data only shows party registration, not which candidate voters support. Most GOP voters are expected to vote on Election Day.

Analysts said the still sizable Democratic turnout puts extra pressure on the Republican Party to push its voters out in the final week and on Nov. 3. That's especially clear in closely contested states such as Florida, Nevada and North Carolina.

“This is a glass half-full, glass half-empty situation,” said John Couvillon, a Republican pollster who tracks early voting closely. “They're showing up more,” he added, but “Republicans need to rapidly narrow that gap.”

In Florida, for example, Democrats have outvoted Republicans by a 596,000 margin by mail, while Republicans only have a 230,000 edge in person. In Nevada, where Democrats usually dominate in-person early voting but the state decided to send a mail ballot to every voter this year, the GOP has a 42,600 voter edge in-person while Democrats have an 97,500 advantage in mail ballots.

“At some point, Republicans have to vote,” said Michael McDonald, a University of Florida political scientist who tracks early voting on ElectProject.org. “You can't force everyone through a vote centre on Election Day. Are you going to expect all those Republicans to stand in line for eight hours?”

Campaigns typically push their voters to cast ballots early so they can focus scarce resources chasing more marginal voters as the days tick down to Election Day. That usually saves them money on mailers and digital ads — something the cash-strapped Trump campaign would likely want — and minimizes the impact of late surprises that could change the race.

Trump's campaign has been pushing its voters to cast ballots early, but with limited success, delighting Democrats. “We see the Trump campaign, the RNC (Republican National Committee) and their state parties urging Trump's supporters to vote by mail while the president's Twitter account says it's a fraud,” Tom Bonier, a Democratic data analyst, said on a recent call with reporters. “The Twitter account is going to win every time.”

But Bonier warned that he does not expect a one-sided election. “There are signs of Republicans being engaged,” he said. “We do expect them to come out in very high numbers on Election Day.”