Top Democrats widen national lead on Trump: poll

Top 2020 Democratic presidential candidates have extended their lead over President Trump in hypothetical head-to-head match-ups one year before voters cast ballots, according to a new poll. 

The ABC News-Washington Post poll released early Tuesday found that former Vice President Joe Biden and Sen. Bernie Sanders (I-Vt.) lead Trump by 17 percentage points, while Sen. Elizabeth Warren (Mass.) leads him by 15 points. 

{mosads}In September, Biden led Trump by 16 percentage points, Sanders led him by 12 points and Warren led by 11 points. The candidates also led Trump in July by 14, 6 and 7 percentage points, respectively.

Sen. Kamala Harris (Calif.) and South Bend, Ind., Mayor Pete Buttigieg both lead Trump by 11 percentage points in the latest survey. Pollsters noted increases from a 10-point lead for Harris and a 6-point lead for Buttigieg in September. 

Researchers surveyed 1,003 adults from Oct. 27-30. The margin of error is 3.7 percentage points. 

The candidates are among more than a dozen running for the 2020 Democratic presidential nomination.