In September, liberal firebrand Sanders had taken the lead in the early primary states of Iowa and New Hampshire.
The vice president's comments came as he weighs whether to enter the 2016 presidential race.
"We have important measures coming up and we’ll need a bipartisan coalition to pass them."
There is speculation that Webb is considering running as an independent.
The news prompted fresh accusations that the panel was created to damage the Democratic front-runner.
For all the hype, Trump mostly tweeted like a bored teenager.
What should be public affairs discussions are turned into branding events for TV personalities.
Democrats have said the panel may have violated ethics rules and should dissolve.
Many of the 20 presidential candidates joined in on the social media conversation.
The event will focus on income inequality and place the New York City leader on the national stage.
The former secretary of state has been losing ground in recent polls to presidential Democratic challenger Bernie Sanders.
Though Democrats used to be considered the more fractious party, they stand by their man.
CNN would allow vice president to take part even if he declares his campaign the day of the event.
The real estate billionaire leads the retired neurosurgeon by one percentage point.
A quarter of Americans who are registered Democrats or lean that way said Biden now is their top choice for president.
The bill would have banned all abortions at 20 weeks, with limited exceptions
Prominent fundraisers began circulating a letter to encourage Biden to run.
Senate Majority Leader Mitch McConnell failed in his attempt to lure at least a couple more Democrats into voting for a resolution of disapproval.
The former Maryland governor aims to cut in half deaths from gun violence within 10 years.
Vermont senator edges ahead in early 2016 presidential primary states.
In a moving interview, the vice president suggests he isn't emotionally ready to run for president.
The U.S. senator holds a one percentage point lead in the state over the Democratic frontrunner.
In recent weeks, there has been widespread speculation about Biden running for president next year.
Democratic candidates are talking police, prison and criminal reform. Not so the Republicans.