Democratic presidential candidate Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE has requested an extension for filing his personal financial disclosure report, which would delay the filing until after the final Democratic primary votes are cast.

The campaign confirmed the request, noting the rigors of the campaign schedule.

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"As the senator has noted, Jane does their taxes, and they've been a tad bit busy," campaign spokeswoman Symone Sanders told The Hill.

The Center for Public Integrity's Dave Levinthal first reported the extension, tweeting an image of the letter to the Federal Election Commission (FEC), which also cited "Senator Sanders' current campaign schedule."

The @BernieSanders campaign asks for 45-day extension in filing Sanders' latest personal financial disclosure pic.twitter.com/QgttdYhuKS — Dave Levinthal (@davelevinthal) April 28, 2016

A 45-day extension would bump the deadline from May 15 to the end of June, well after the final votes are cast on June 7 in California.

All presidential candidates are required to file the disclosure once they declare a presidential bid and annually, so this report would update on the period between his entry into the race and the end of the calendar year.

The decision comes after Sanders released his 2014 tax returns but bucked calls to release any more. Jane Sanders, his wife, told CNN this week the candidate would release more returns if Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE released transcripts of her paid speeches.