Poll: Biden holds 2 point lead over Sanders nationally

Poll: Biden holds 2 point lead over Sanders nationally
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Former Vice President Joe BidenJoe BidenImpeachment week: Trump probe hits crucial point Trump DACA fight hits Supreme Court Juan Williams: Honesty, homophobia and Mayor Pete MORE holds a slim 2-point lead over his closest competitor in the Democratic primary field, according to a poll released Tuesday.

An Emerson poll conducted Oct. 18–21 found Biden in the lead with the support of 27 percent of Democratic primary voters, while Sen. Bernie SandersBernie SandersJuan Williams: Honesty, homophobia and Mayor Pete Democrats on edge as Iowa points to chaotic race Democrats debate how to defeat Trump: fight or heal MORE (I-Vt.) followed closely at 25 percent.

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Sen. Elizabeth WarrenElizabeth Ann WarrenJuan Williams: Honesty, homophobia and Mayor Pete Trump DACA fight hits Supreme Court Democrats on edge as Iowa points to chaotic race MORE (D-Mass.), who previously led Sanders in the poll, slid 2 percentage points from the September poll and now sits in third place with 21 percent.

As with other recent polls, no other candidate besides the top three registered support in the double digits. South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegJuan Williams: Honesty, homophobia and Mayor Pete Democrats on edge as Iowa points to chaotic race Democrats debate how to defeat Trump: fight or heal MORE (D) came in fourth place in October's poll with the support of just 6 percent of Democratic primary voters.

Sanders is strongest among younger voters, with 45 percent of the 18–29 age group supporting him, by far the largest of any Democratic candidate. Warren placed second among this group with 17 percent.

Biden had a similar level of support, 44 percent, among voters age 50 and over.

All three of the top-tier Democratic candidates in the poll led President TrumpDonald John TrumpThis week: House kicks off public phase of impeachment inquiry Impeachment week: Trump probe hits crucial point Judd Gregg: The big, big and bigger problem MORE in hypothetical matchups by the same margin: 51 percent to 49 percent.

Emerson's poll, which contacted 430 registered Democratic primary voters and 1,000 voters overall, has a margin of error of plus or minus 4.7 percentage points among Democratic voters and 3 percentage points overall.