Biden retains big lead in poll, but Warren shows progress

Biden retains big lead in poll, but Warren shows progress

Former Vice President Joe BidenJoe BidenScaramucci attends charity event featuring Biden in the Hamptons Klobuchar knocks Trump: 'This negotiating by tweet hasn't been working' Rendell: Biden 'baked in' as Democratic nominee MORE is holding on to his solid lead in the Democratic presidential primary, but Sen. Elizabeth WarrenElizabeth Ann WarrenTrump preps conspiracy theory to explain faltering economy Sanders, Warren back major shift to fight drug overdoses Rendell: Biden 'baked in' as Democratic nominee MORE's (D-Mass.) support is ticking upward, according to a new Morning Consult survey.

Thirty-seven percent of Democratic primary voters said they supported Biden in the poll, marking a 1 percentage point slip in support for the former vice president. 

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Warren's support, on the other hand, ticked up one point since last week. The same tracking poll showed Warren entering double-digit support earlier this month, putting her at third place behind Biden and Sen. Bernie SandersBernie SandersTrump preps conspiracy theory to explain faltering economy Sanders doubles down on 'Medicare For All' defense: 'We have not changed one word' Sanders, Warren back major shift to fight drug overdoses MORE (I-Vt.). 

The Massachusetts senator has consistently unveiled a number of policy initiatives through the year and has seen her support steadily climb in the primary polls.  

Biden has made fewer appearances on the campaign trail in recent weeks, but his name recognition is seen as having helped him maintain a solid lead in a crowded field of 24 Democrats in the primary. 

The former vice president will touch down in Iowa on Tuesday and is slated to slam President TrumpDonald John TrumpGraham: America must 'accept the pain that comes in standing up to China' Weld 'thrilled' more Republicans are challenging Trump New data challenges Trump's economic narrative MORE in a speech to voters in the first-in-the-nation caucus state

A CNN–Des Moines Register poll released last week showed Biden's support in the Hawkeye State slipping by about a third to 24 percent from the initial survey.