Despite a gaffe-prone campaign, former vice president Joe Biden still has the best chance of beating president Donald Trump in 2020, according to four new polls conducted from October 17 to 30 and released Monday.

The 76-year-old Biden still remains Trump's likeliest foe among the 16 remaining contenders for the Democratic Party nomination, according to the latest CNN Poll of Polls of the Democratic primary race. The Poll of Polls averages the four most recent non-partisan, live operator, national surveys on the race for the Democratic presidential nomination conducted among registered voters.

It shows Biden still leading the race with 28 percent of those polled supporting his candidacy. Behind Biden is Sen. Elizabeth Warren (D-MA) who is the bet of 23 percent of voters, while 17 percent favor Sen. Bernie Sanders (I-VT). Previous polls have shown Biden, Warren and Sanders, the oldest among the Democrat field, consistently at the top of the list. Sanders is 78 years old and Warren, 70.

Popular Indiana Mayor Pete Buttigieg, who is only 37 years old, got eight percent support. Behind him is Sen. Kamala Harris (D-CA) with four percent, Sen. Amy Klobuchar (D-MN) with three percent and businessman Andrew Yang, Sen. Cory Booker (D-NJ), and Rep. Tulsi Gabbard (D-HI) with two percent each.

The Poll of Polls was conducted after the fourth Democratic primary debate in October. As with past polls, this one shows Biden as the likeliest to defeat Trump despite other state polls showing a tighter race with Sanders and Warren.

A CNN poll conducted by SSRS in early September showed Biden leading the field with 24 percent. In his wake are Warren with 18 percent and Sanders with 17 percent. This outcome is similar to the new CNN Poll of Polls.

This latest Poll of Polls includes the Fox News poll conducted Oct. 27-30; The Washington Post/ABC News poll conducted Oct. 27-30; the NBC News/Wall Street Journal Poll conducted Oct. 27-30; the Quinnipiac University poll conducted Oct. 17-21 and the CNN Poll conducted by SSRS Oct. 17-20.

On the other hand, new surveys by The New York Times Upshot and Siena College based on a poll of 3,766 registered voters from Oct. 13 to Oct. 26 shows Trump remaining "highly competitive" and trailing Biden by an average of two points among registered voters in the six closest states that went Republican in 2016. These polls also show Trump ahead of Warren by two points among registered voters, the same margin as his win over Hillary Clinton in these states.

"President Trump remains highly competitive in the battleground states likeliest to decide his re-election," the report wrote.

The Times/Siena polls also show Biden as the strongest Democrat in the swing states polled. It also confirms a hugely polarized but energized electorate that remains divided along the lines of the 2016 presidential election.

Over 90 percent of Trump’s supporters from 2016 approve of his performance, while more than 90 percent of Mrs. Clinton’s voters disapprove.

Former vice president Joe Biden still leads in nationwide polls but has slipped to fourth in the important early caucus state of Iowa; here he is seen speaking at an event November 1, 2019 in Des Moines, Iowa
Former vice president Joe Biden still leads in nationwide polls but has slipped to fourth in the important early caucus state of Iowa; here he is seen speaking at an event November 1, 2019 in Des Moines, Iowa GETTY IMAGES NORTH AMERICA / Joshua LOTT