"[Biden] and now leads the pack with 34 percent of Democrats and independent voters who lean Democratic", a press release summarizing the poll said. "Massachusetts Senator Elizabeth Warren has 15 percent, with 12 percent for California Senator Kamala Harris and 11 percent for Vermont Senator Bernie Sanders".
Democrats are slated to hold their next debate this week on Tuesday and Wednesday.
"Electability remains his [Biden’s] strongest pull", Quinnipiac Polling Analyst Mary Snow said in the release. "Across the board, Biden remains by far the Democrat seen as having the best chance of defeating President [Donald] Trump".
Meanwhile, 32 percent of all American voters say they "definitely" will vote for Trump if he is the Republican candidate in the 2020 presidential election, while 12 percent say they will consider voting for Trump, according to the poll.
But 54 percent of all American voters say they "definitely" will not vote for Trump, the poll revealed.