In call with Senate Democrats, Biden vows aggressive campaign schedule and promises not to take election for granted

Biden, speaking for roughly 25 minutes and taking a few questions, said repeatedly he was not finding comfort in polls showing him ahead of President Donald Trump.

Sen. Chris Coons of Delaware, who occupies Biden's old Senate seat, said the party's presidential nominee spoke about how "optimistic he is about the election but he must have said his three times, 'I take nothing for granted. I know the polls look OK right now but I'm working tirelessly,' " pointing out that he was just in Florida and would soon head to other key battlegrounds. Coons said that Biden reiterated "the core themes of the campaign, fighting for the soul of the country."

"I think he's going to be traveling more," said Sen. Jack Reed, a Rhode Island Democrat. "I think the message was how they're organizing to win and how they're taking nothing for granted."

Sen. Tom Carper of Delaware also said Biden's message was that the race was far from over, but he thanked his Senate colleagues for their support. Carper said Biden made it clear that everyone needed to run through the tape to Election Day.

Sen. Tim Kaine of Virginia said that Biden was "paying attention to the Senate races," too, in the battle for control of the chamber. Democrats need a net gain of three seats to win a majority if they also win the White House, since the vice president breaks ties in the Senate, or four if they lose the presidency.

"I think he's going to be very vigorous in the last stretch of the campaign," Kaine, the 2016 Democratic vice presidential nominee, said after the call.

Sen. Gary Peters, a Michigan Democrat, said Biden had an "incredible amount of energy" on the call. Peters, who's one of just two Democrats running for reelection this year in Trump states, said there was "no question" Biden would help his race in Michigan as well.

Sen. Dick Blumenthal said there were no concerns raised by Democrats about the state of the campaign. Biden spoke "generally about the state of the race" and "why he's so hopeful" and how they're using "surrogates to contrast style, substance and basic values," the Connecticut Democrat said.

Sen. Joe Manchin of West Virginia said Biden's schedule is "packed" in the final weeks -- and that the nominee said that money is "pouring" into the race.

"He was just Joe. If you don't like Joe, you don't like yourself," Manchin said.