Joe Biden

"He didn’t say anything about whether or not I was telling the truth about Social Security.”

"Vice President Biden has proven again and again that he is a friend to union ironworkers."

"I never saw anything like that.”

"Bernie’s negative attacks won’t change the truth."

"We can’t even get a floor vote on Medicare for all."

Biden "is a decent person."

"Nobody likes him."

"Our job is not just to remember the history of Dr. King, it is to absorb his revolutionary spirit and apply it today."

"Both of them are qualified.”

"I didn't know about a specific letter, but if he wrote a letter, it wouldn't have been a big deal."

"In the end, they will play dirty because they think that they pass a purity test that Republicans and most Democrats don't pass."

Former Vice President Joe Biden says he would consider Sen. Kamala Harris (D-Ca.) for Vice President or any other role she wanted if he were to win the Democratic primary.

"I thought they were lying. I didn’t believe them for a moment."

Here is how each of them fared.

Six Democratic White House contenders will take part on Tuesday.

"I would vote that way again today. It was the right vote then, and it would be the right vote today."

"I think a lot of the 'unelectability' thing is just misogyny."

"There's a lot of them that stand out but you have to go with experience."

"I believe Sanders is the candidate who best aligns with my value."

Joe Biden slammed Trump's handling of the escalating tensions with Iran.