Poll: Biden leads Trump by 12 points in head-to-head matchup

The big picture: Biden’s Democratic voter support has remained unchanged compared to a Fox News poll conducted in March, while Sen. Elizabeth Warren's has increased by 17 points, Mayor Pete Buttigieg is up 6 and Sen. Bernie Sanders is down 4.

Highlights: The national poll, which surveyed 1,040 registered voters between Oct. 27-30, goes by popular vote, unlike state polls.

• If put up against Trump, Sanders would win with an 8-point lead (49%-41%). Warren would win 46%-41%, within the poll's margin of sampling error.
• Still, more than 25% of Democratic voters say they wish they had other options.

Methodology: The Fox News poll was under the joint direction of Beacon Research (D) and Shaw & Company (R) with a margin of error plus or minus 3 percentage points for all registered voters and 4.5 points for Democratic primary voters.