Warren Declines to Say if Kaine Was 'Right' VP Pick

Is Sen. Tim Kaine the right vice presidential candidate to unite a fragile Democratic Party? Sen. Elizabeth Warren won't say.

With progressives still uneasy about Hillary Clinton's candidacy, the Massachusetts Democrat declined to say Tuesday whether Clinton had tapped the best running mate to convince supporters of Sen. Bernie Sanders to back her campaign.

"I've known Tim since I've been in the Senate, and he is a good man," Warren said in an interview with ABC's David Muir.

Asked if Clinton made the "right pick," Warren didn't directly respond.

"He's a good man, he has a good heart and he has a lot of experiences," she said. "He's going to be a valuable member of the team when she is president."

In her primetime address to the Democratic National Convention Monday, Warren - who was also vetted for vice president by Clinton's team - said Clinton and Kaine share the values of all Democrats.

"We believe that no matter who you are, no matter where you're from, no matter who you love, equal means equal," Warren said. "Hillary will fight to make sure discrimination has no place in America and we're with her."

Many progressives are at odds with Clinton's and Kaine's past support of the Trans Pacific Partnership trade deal, and Sanders supporters could be seen touting "No TPP" signs in Philadelphia. Both say they now oppose the deal.

Sanders supporters are still smarting over the disclosures from thousands of hacked DNC emails, which reveal efforts by top party officials to undermine the Vermont senator's insurgent primary campaign.

For his part, Sanders forcefully endorsed Clinton in Philadelphia this week, and urged his supporters to do the same.