Former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE leads Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) by just 4 points in Nevada, according to a USA Today–Suffolk University Political Research Center poll released Tuesday, a slim lead that has Warren within the margin of error.

ADVERTISEMENT

When respondents were given a list of 20 Democratic candidates and asked who'd they vote for or lean toward in Nevada's February caucuses, 23.2 percent said Biden, while 19.4 percent chose Warren. Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) came in third at 14.2 percent.

No other candidates received 10 percent of the vote. Twenty-one percent of those surveyed said they remain undecided.

Biden also led in a Morning Consult–Politico poll of Nevada voters in July but held a 6-point lead, 29 percent to 23 percent, over Sanders. Warren was in third in that survey with 11.5 percent of the vote.

The news that Warren falls within the margin of error in the early caucus state comes on the heels of a Des Moines Register–CNN–Mediacom poll of likely Democratic caucusgoers in Iowa that found that 22 percent support Warren for president, while 20 percent said Biden was their top choice.

That poll was the first time that Warren had led Biden in an Iowa survey. Biden was within the margin of error on that poll.

The USA Today–Suffolk University poll surveyed 500 likely Democratic caucus voters and has a margin of error of plus or minus 4.4 percentage points.