However, in the FiveThirtyEight weighted average of national polls, Biden holds a nine-point advantage over Warren, who is marginally ahead of Sanders.
A look inside the Q poll's crosstabs show that Warren lost 14 points with black voters, and now polls at six percent with that group to Biden's 43 percent. Among moderate/conservative voters, Buttigieg leads with 23% support, followed by Biden with 18%, Sanders with 17% and Gabbard with 11%.
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Former Vice President Joe Biden regained the lead in the Democratic primary race for the United States presidency while support for Senator Elizabeth Warren plunged 14 percentage points from October, the latest Quinnipiac University poll revealed.
Biden polled ahead because of his experience on health care, which was the most important issue for 26 percent of those polled.
Buttigieg still remains in fourth place in the national poll aggregate compiled by RealClearPolitics, behind Biden, Sanders and Warren. Warren holds the third spot with 14% while Buttigieg comes in last among the top tier with 11%.More news: To be acquired by Novartis for $9.7B
"A new poll shows that since early October, Bernie has gained a whopping 9 points in the early primary and caucus states that could play a pivotal role in the 2020 election", Sirota wrote.
The Quinnipiac poll offers mixed news for 77-year-old Bloomberg, who, on Tuesday, said he would release his tax returns without specifying how many years of records would be made public. And in a sign the field could rejigger further, 55 percent of Democratic primary voters said there's a chance they could change their minds ahead of the February 11 primary.
"Biden is back on top of the pack, but now there is a 3-way race for second", Quinnipiac University Polling Analyst Tim Malloy said in a statement.More news: Trump chosen by God to be president, says Rick Perry
In Iowa on Tuesday, the campaign released a new ad focused on the state that featured a new rallying cry for the campaign: "Big Us".