(Headline USA) After months of avoiding direct contact with voters because of the pandemic with its candidate rarely venturing away from his home, Joe Biden‘s campaign is about to launch in-person canvassing efforts across several battleground states.

The decision comes amid growing concern from Democratic officials on the ground in key states who fear that Biden has been giving a significant advantage to President Donald Trump and his Republican allies, who have been aggressively courting voters at their doorsteps for months. The change also reflects a sense of rising urgency as polls tighten in key states just a month before Election Day.

Biden’s campaign, which detailed the new effort to The Associated Press, insists that its existing phone and online voter-outreach operation is effective. The new plans will build upon what’s already in place, not replace it.

“Our voter contact operation is the most innovative and technologically advanced of any presidential campaign in history, and it has been thriving in this unprecedented environment,” Biden campaign manager Jenn O’Malley Dillon said.

“We’re now expanding on our strategy in a targeted way that puts the safety of communities first and foremost and helps us mobilize voters who are harder to reach by phone now that we’re in the final stretch — and now that Americans are fully dialed-in and ready to make their voices heard.”

Biden this weekend will dispatch several hundred newly trained volunteers to engage voters across Nevada, Michigan, New Hampshire and Pennsylvania. The effort, focusing on voters who are considered difficult to reach by phone, is expected to spread into several more battleground states and include many more volunteers in the next few days and weeks.

Campaign officials and volunteers acknowledge their virtual-contact strategy had holes they’re hoping to fill with in-person conversations.

“It’s just harder and harder to get people on the phone,” said Patrick Sullivan, a Biden volunteer who lives in suburban Harrisburg, Pennsylvania. “So being able to go to someone’s door and talk to them makes a big difference.”

There is no doubt that voters are focused on the 2020 election, yet lingering questions remain about the commitment of Biden supporters in particular to actually vote. To defeat Trump, Democrats will need strong turnout from every piece of his coalition, including groups that typically don’t vote in large numbers, such as younger Americans and African Americans.

And with many still fearful of a pandemic stoked by an alarmist media and his Democrat allies, voters in 2020 face unprecedented challenges in getting to the polls.

“It is possible that without the face-to-face-engagement, you may have a few voters who fall off,” said Mairi Luce, an attorney and a Biden volunteer who lives in Philadelphia. “But passions run high on both sides, and a lot of people are motivated to vote. I don’t think there are a lot of undecided voters out there.”

Ahead of the voter outreach expansion, Biden’s campaign has already opened 109 supply centers across 17 battleground states to help distribute campaign literature, lawn signs and other materials for the canvassers.

Biden volunteers in Pennsylvania and Nevada began dropping campaign literature at voters’ homes just last weekend, although they were instructed to avoid any direct conversations. Those conversations will begin this weekend following a series of training sessions designed to ensure Biden’s team can engage with people at doorsteps as safely as possible.

All volunteers involved will be provided personal protective equipment, including masks, and will have their temperatures checked. The campaign also plans to send batches of text messages telling voters to expect a knock at their door before volunteers enter a neighborhood.

Biden’s team is particularly focused on ensuring his supporters have updated information about how and where to vote as early as possible. Literature used in Pennsylvania in recent days, for example, encourages people to make a specific plan to vote — either by mail, in person early voting or in person on Election Day.

Even before Biden executes his new plan, Democrats are leading Republicans in some early voting prodding. For example, registered Democrats have been issued far more mail and absentee ballots than Republicans in Florida, Iowa and Pennsylvania, according to data collected by The Associated Press.

Adapted from reporting by Associated Press.