The U.S. Supreme Court on Monday denied Donald Trump's latest attempt to block Manhattan District Attorney Cy Vance from obtaining his tax returns, dealing a deathblow to the former president's efforts to shield his financial records from an ongoing criminal investigation.

The ruling will require Trump to comply with a subpoena for eight years of his personal and business tax records. The former president's legal team has repeatedly fought that request, most recently challenging it as "wildly overlybroad."

In an unsigned order on Monday, the Supreme Court rejected that argument, siding with the two lower courts that had dismissed the latest appeal effort late last year.

Trump's accounting firm, Mazars, has said it will comply with the subpoena. But it remains unclear whether those records will be made public, due to a New York law thats bars the release of information provided to a grand jury.

The subpoena comes as part of Vance's ongoing investigation into hush money payments that Trump allegedly paid to multiple women he had slept with ahead of the 2016 presidential election. Filings indicate that the prosecutor may also be looking at Trump's Organization for tax and insurance fraud.

Earlier this week, the Manhattan D.A. subpoenaed the New York City Tax Commission, suggesting the prosecutor may be looking at whether Trump inflated the value of his properties in order to obtain more favorable loan terms.

On Monday morning, Vance issued a brief statement: "The work continues."