Where are Bernie's tax returns?

Balloon Juice transcribed part of the program:

Chris Matthews: You just said that Trump is hiding something, by not releasing his tax returns. What is your candidate hiding?

Weaver: I — my — my candidate is not hiding anything.

Matthews: But then why doesn’t he release his tax returns?

Weaver: He has released some —

Matthews: He’s released one year of fourteen. That’s it.[emphasis added]

Weaver: — and he has House and Senate ethics reports —

Matthews: Yeah, but why doesn’t he release his tax returns? You just said a minute ago that a politician running for President that doesn’t release his tax returns has something to hide —

Weaver: But that’s Donald Trump! You asked about Donald Trump, Chris!

Matthews: I asked you, why wouldn’t a politician release his tax returns…

Weaver: That’s not a hypothetical, you said why isn’t Donald Trump revealing his tax returns?!?

Matthews: Okay, fine. You said that Donald Trump would not release his tax returns because he was obviously trying to hide something. What is Senator Sanders hiding?

Weaver: He’s hiding nothing. And I think — if you talk to anybody in the media — who saw those tax returns in 2014 — everybody who thought there was gonna be some big thing in there, and you know what? Zero!

Matthews: I’m just asking the question, live question, right now: You just went after Trump, for not releasing his returns. Why doesn’t your guy do it?

Weaver: Yes, and that — because Trump is a flim-flam artist, and a fraud! We’ve seen that, in his university, and —

Matthews: Why don’t you address yourself to the question I just asked? Why doesn’t your guy release the returns? Give me an answer!

Weaver: Well, he will.

Matthews: Oh, he will?

Weaver: Sure! He said he will!

Matthews: Senator Sanders will release his returns during the course of this campaign?

Weaver: He said he will…

Matthews: Before the convention.

Weaver: He said he would, yeah.

Matthews: Well, can you give me a date?

Weaver: I’ll be happy to get you a date, Chris…

Rob's comment:

Hillary has released eight years of her personal returns, and she and Bill combined have released a lot more:

In addition to this medical summary, the campaign also posted to its website the last eight years of Clinton’s personal tax returns, covering 2007–2014. This supplements the public release of the family’s tax returns from 2000–2006 during her 2008 campaign, returns from 1992–1999 disclosed annually during her husband’s time in the White House, and prior returns released by her husband’s presidential campaign. All told, the Clintons have made their tax returns public for every year dating back to 1977.