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.) is closing in on top White House contender 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 with climate-focused voters, a new poll shows.

The latest polling from the Sierra Club and Morning Consult shows Biden receiving 31 percent of the vote among voters who consider climate issues “very important” while Warren gained 25 percent of the vote.

ADVERTISEMENT

Warren's numbers represent a 4-point increase from the same poll in August, picking up 3 points on Biden who went up 1 percent in that same time frame.

The numbers show a steady climb for Warren on the issue after polling at 15 percent in the same poll in June. Biden was at 37 percent in that poll.

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.), whose ambitious plan has been the most highly ranked by some environmental groups, finished third in the new survey with 19 percent.

Warren’s climate plan has become more robust since the last round of polling.

In September she announced she would adopt the plan proposed by “climate candidate” Gov. Jay Inslee Jay Robert InsleeBarr asked prosecutors to explore charging Seattle mayor over protest zone: report Bottom line Oregon senator says Trump's blame on 'forest management' for wildfires is 'just a big and devastating lie' MORE (D-Wash.) who had recently dropped out of the race. Those policies were added to her existing plans for public lands and green manufacturing.

The poll was conducted with 1,500 Democratic voters in the last week of September, including 936 “climate voters.” The poll has a margin of error of plus or minus 3 percentage points.