Elizabeth Warren is still running strong in Nevada, trailing only longtime front-runner Joe Biden in a new Suffolk University/Reno Gazette Journal poll of likely Democratic caucusgoers.

The survey released Tuesday shows the two-term Massachusetts senator now lags Biden by a mere four percentage points in the Silver State — a gap that’s smaller than the poll’s margin of error.

The poll suggests Warren has continued to capitalize on her sizable early investment in Nevada, where her sprawling campaign team has helped lift the candidate to second-place finishes in three of six recent polls.

The results send a more worrying message to Biden, whose support appears to have tapered after a pair of shaky debate performances and a series of high-profile verbal miscues.

USA TODAY:More good news for Elizabeth Warren, within striking distance of Joe Biden in Nevada

The ex-senator from Delaware picked up 23 percent support among those who responded to Tuesday’s poll, down about nine points from his showing in a June survey of Nevadans conducted by Monmouth University.

Warren won over 19 percent of those surveyed between Sept. 19 and Sept. 22, topping fellow progressive firebrand and U.S. Sen. Bernie Sanders, I-Vt., who was favored by 14 percent of respondents.

Sanders still leads Warren in most other Nevada polls conducted so far this year, though he’s fallen behind her and Biden as Nevadans’ second choice for the coveted 2020 Democratic presidential nomination.

More:Poll: Warren out to an early lead over Sanders in Nevada, but Biden still leads the pack

Related:Suffolk/RGJ poll: Nevadans split on Senate, governor races — not ready to impeach Trump

U.S. Sen. Kamala Harris, D-Calif., landed fourth in Tuesday’s survey with support from 4 percent of respondents. Tech entrepreneur Andrew Yang; South Bend, Ind., Mayor Pete Buttigieg and hedge fund billionaire Tom Steyer each won 3 percent.

The latest Suffolk/RGJ poll shows that 21 percent of likely Nevada caucusgoers remain undecided about their preferred nominee and 58 percent said they may change their mind before the state hosts its crucial early nominating contest in February.

One of those persuadables is Priscilla Bauer, a 79-year-old Reno resident who liked Biden’s experience and ties to Obamacare, but said she may end up caucusing for another candidate.

“He’s smart, he knows what he’s doing,” she said of Biden. “I know they criticize him for his age, but when you get to be my age, you get a sense of who’s presidential.”

Robert Cranston, a fine wine importer from Las Vegas, was one of the few poll respondents who remains completely undecided on a presidential pick.

Cranston said he likes a lot of what he’s heard lately from Sanders, Warren and U.S. Sen. Cory Booker, though he doubts any of those hopefuls can actually carry out their policy proposals in a political system that remains flush with dark money provided by special interest groups.

He doesn’t expect to settle on a preferred candidate until much closer to February, after most of the low-polling contenders have dropped out.

“I think Warren would be great, I think Sanders would be great,” Cranston said. “But I don’t see much changing, unless somebody decides to do away with lobbyists and adopt the Canadian (campaign funding) model.”

Poll respondents said the top issues on their mind are health care and climate change. Some 57 percent said they would support impeaching embattled U.S. Supreme Court Justice Brett Kavanaugh. Roughly the same proportion said they considered it “very important” to raise taxes on the wealthiest Americans.

Nearly two-thirds said they support a mandatory buyback program for AR-15’s and AK-47's, such as the proposal recently put forth by Democratic former congressman and 2020 presidential hopeful Beto O’Rourke.

Around one-third of those polled said they want to scrap Obamacare and replace it with the type of Medicare For All plan popularized by Sanders and Warren.

Nevada’s third-in-the-nation Democratic caucus is scheduled for Feb. 22.

James DeHaven is the politics reporter for the Reno Gazette Journal. He covers campaigns, the Nevada Legislature and everything in between. Support his work by subscribing to RGJ.com right here.