The release of Trump’s tax returns is an issue Americans of both parties seem keen to hang on to. In January, a poll by ABC News and The Washington Post found that 74 percent of Americans believed that Trump should release his returns. Another poll found that 64 percent of Republicans want to see Trump’s tax returns too.

Though the turnout of Saturday’s March isn’t expected to be as large as the Women’s March on Washington, Trump’s unwillingness to show the public his tax records has evoked plenty of frustration. He is the first president to break with the 40-year tradition of presidential candidates releasing tax returns before a general election. Americans generally support the idea, largely because tax returns reveal a great deal more about an individual’s finances than the voluntary financial disclosures Trump provided as an alternative during the campaign.

With that level of interest, it’s no wonder that Rachel Maddow’s tax scoop in March, a few pages from the president’s 2005 tax returns, was a nonevent that still received immense media and public attention. Anna Chu, one of the organizers of the Tax March who works at the National Women’s Law Center, told DCist that the leak didn’t show what the public needs to see. And a one-page leak of Trump’s record to The New York Times only whet the public’s appetite. The speculation that his returns might turn up concerning revelations is amplified by ongoing worries that Trump hasn’t taken adequate measures to distance himself from his businesses while in office, resulting in myriad conflicts of interests.

As president, Trump’s returns will be automatically selected for auditing every year in accordance with an IRS rule. But that mandatory audit won’t reveal his finances to the public, nor will it scrutinize the president’s financial situation prior to taking office.

After Trump’s inauguration, the first petition to appear on the White House’s citizen-petitions website We the People called for the immediate release of the president’s tax returns. That petition has since garnered over a million signatures, the most signatures a We the People petition has ever gotten, though there’s been no official response from the White House. The idea for the march started as a tweet from a professor and a comedian; the fact that it’s turned into a national event is indication enough that Americans have no intention of letting the matter go easily.

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