(Bloomberg) -- Joe Biden and Bernie Sanders, representing rival visions for the Democratic Party, are solidifying their status as frontrunners in the crowded presidential field, according to a Washington Post-ABC News national poll.

Just a week before voters finally get to have their say in the Iowa caucuses, the polls show Biden with 32% overall among registered voters who lean Democratic, while Sanders registered support from 23%. Both are doing slightly better than in the same poll in October.

Senator Elizabeth Warren, once considered a front-runner and with endorsements from the New York Times a week ago and the Des Moines Register in Iowa on Saturday, has seen a significant drop in her support. She was at 12% in this poll, down from 23% in October.

Former New York Mayor Michael Bloomberg, who has spent $250 million on advertising since getting a late start in the race and will not compete in the first contests, pulled in support from 8%. Bloomberg is the founder and majority owner of Bloomberg LP, the parent company of Bloomberg News.

Businessman Andrew Yang, former South Bend, Indiana, Mayor Pete Buttigieg and Senator Amy Klobuchar, who was also endorsed by The New York Times, were all mired in single digits. The Washington Post-ABC News poll was conducted by telephone January 20-23, 2020. Results have an error margin of plus or minus 3.5 percentage points.

Separately, an NBC News/Marist poll for New Hampshire released on Sunday showed Sanders and Buttigieg leading in the state.

COMING UP:

Some of the Democratic candidates will debate again in New Hampshire on Feb. 7.

The first-in-the-nation Iowa caucuses will be held Feb. 3. The New Hampshire primary is Feb. 11. Nevada holds its caucuses on Feb. 22 and South Carolina has a primary on Feb. 29.

CNN will host town halls featuring eight presidential candidates in New Hampshire on Feb. 5 and 6.

(Disclaimer: Michael Bloomberg is also seeking the Democratic presidential nomination. He is the founder and majority owner of Bloomberg LP, the parent company of Bloomberg News.)

To contact the reporter on this story: Magan Crane in New York at mcrane19@bloomberg.net

To contact the editors responsible for this story: Wendy Benjaminson at wbenjaminson@bloomberg.net, Ros Krasny

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