Democratic presidential hopeful Sen. Bernie Sanders Bernard (Bernie) SandersAndrew Cuomo: Biden has best chance at 'main goal' of beating Trump Poll: Buttigieg tops Harris, O'Rourke as momentum builds Buttigieg responds to accusation of pushing a 'hate hoax' about Pence MORE (I-Vt.) says in a new interview that he will release his tax returns by Monday while acknowledging that he is a millionaire because of book sales.
"On the day in the very immediate future, certainly before April 15, we release ours, I hope that Donald Trump Donald John TrumpRussia's election interference is a problem for the GOP Pence to pitch trade deal during trip to Michigan: report Iran oil minister: US made 'bad mistake' in ending sanctions waivers MORE will do exactly the same," he told The New York Times for a story published Tuesday.
"We are going to release 10 years of our tax returns, and we hope that on that day Donald Trump will do the same," he continued.
Sanders acknowledged in the interview that he is a millionaire, attributing it to his book sales. The newspaper noted that his most recent book, "Where We Go From Here," was published last year.
Sanders and other Democratic presidential candidates have sought to release their own financial information in an effort to push Trump to release his tax returns.
During the 2016 election, Trump cited an IRS audit as his reason for not releasing his returns. The agency has said audits don't prohibit individuals from releasing information about their own finances.
Sanders has long promised to release his tax returns in connection with his presidential campaign and has said he and his wife, Jane, prepare them without an accountant, according to the Times.
Several other Democratic contenders for president, including Sens. Kirsten Gillibrand Kirsten Elizabeth GillibrandGillibrand pledges not to use 'stolen hacked' materials in 2020 campaign 2020 Dems rebuke Trump on Iran, say they'd put US back in nuclear deal Where 2020 Democratic candidates stand on impeachment MORE (N.Y.), Amy Klobuchar Amy Jean KlobucharStudent slams Klobuchar for trying to classify pizza sauce as vegetable Pete Buttigieg: 'God doesn't have a political party' The Hill's Morning Report - Dem candidates sell policy as smart politics MORE (Minn.) and Elizabeth Warren Elizabeth Ann WarrenJulián Castro: Trump should be impeached for trying to obstruct justice 'in very concrete ways' Poll: Biden tops Sanders nationally Pete Buttigieg: 'God doesn't have a political party' MORE (Mass.) and Washington Gov. Jay Inslee Jay Robert Inslee2020 Dems rebuke Trump on Iran, say they'd put US back in nuclear deal Washington poised to become first state allowing 'human composting' Inslee urges 2020 rivals to join push for debate focused on climate change MORE, have released years of their tax returns.
Sanders has consistently ranked among the least wealthy senators but has made more money since his 2016 presidential campaign. According to his 2017 Senate financial disclosure forms, he earned roughly $1.06 million that year, most of it from book royalties, according to the Times.