According to a recent Pew survey of registered Democrats, 53 percent said they want the party to pursue a "more moderate direction", while 40 percent preferred the more liberal politics that emerged in the wake of the 2016 election.
Sanders, 77, has also listed Social Security payments for each year of the decade of tax returns he made available Monday.
'If I make a lot of money, you make a lot of money, that is what I believe, ' he told his guests.
"These tax returns show that our family has been fortunate".
The independent senator from Vermont, who is leading early polls of 2020 Democratic presidential contenders, released a decade's worth of tax returns on Monday that show he has earned seven figures in recent years, largely due to sales of his 2016 book, "Our Revolution".
The perception of a contrast between Sanders' wealth and his rhetoric has become a campaign issue on both the left and the right.
There is no requirement that presidential candidates release their tax returns, but many have done so by tradition.
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Former Sanders surrogate Jonathan Tasini in an email called the ThinkProgress clip "despicable" and said he initially "thought it was a Republican attack video masquerading as a Democratic production". "I suspect Joe and Jane Six-pack are - unless there's something we don't know about - are gonna move on from this story once they're released". "In my and my wife's case, I wrote a pretty good book".
He said that his view has always been that the wealthiest Americans ought to pay more taxes. 'So, I don't apologize for writing a book that was number three on the New York Times Best Seller, translated into five or six languages'.
Sanders reported an adjusted gross income of almost $561,293 and paid $145,840, a 26% effective rate, in 2018, the documents show.
"When you wrote the book and made the money, isn't that the definition of capitalism and the American dream?"
Bernie and Jane Sanders claimed no expenses from Jane's business. He also challenged Trump to release his tax returns.
A video produced last week by ThinkProgress entitled, "Bernie's Millionaire Problem", criticized Sanders by attempting to paint him as a hypocrite for asking wealthy Americans to pay their "fair share" in taxes. Senator Kirsten Gillibrand and her husband earned about US$215,000 in 2018. "Hey President Trump, my wife and I just released 10 years".
Sen. Elizabeth Warren of MA, who has also made anti-corruption a key focus of her campaign, reported the next highest income out of the six Democrats who have released at least a decade of returns, showing an adjusted gross income between her and her husband of over $846,000. In 2017, he and his wife Amy's adjusted gross income was $366,455, and they paid a total of $81,019 in taxes for a 22 percent tax rate.