Democratic presidential candidate 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’s campaign chairman says Sen. 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 (I-Vt.) should be on the Washington, D.C., ballot.

An administrative error should not keep a candidate off the ballot. Let's get @BernieSanders on the ballot in DC. — John Podesta (@johnpodesta) March 31, 2016

“An administrative error should not keep a candidate off the ballot,” John Podesta tweeted on Thursday. "Let’s get @BernieSanders on the ballot in D.C.”

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Sanders's name is still not on presidential ballots in the District of Columbia because of a Democratic Party mistake.

The District's Democratic Party missed a filing deadline with the D.C. Board of Elections on March 16, turning in registration documents for Sanders a day late.

A D.C. voter then filed a challenge against Sanders's registration. The matter is scheduled for an April hearing.

“Bernie will be on the ballot,” D.C. Democratic Party Chairwoman Anita Bonds said Wednesday, predicting the challenge would be resolved.

Bonds also noted that her party’s filing deadline is a few hours after the D.C. Board of Elections closes, so past filings have been turned in the following day.

She said she would submit a “clarification” to city rules allowing a 24-hour grace period after the initial deadline. Another option, she added, is having the D.C. Council conduct an emergency vote instead.

Clinton and Sanders each paid $2,500 in registration fees for the primary, which is scheduled for June 14.

Sanders trails Clinton by about 9 points nationwide, according to the latest RealClearPolitics average of polls.

He also trails her in delegates, with 1,011 to Clinton’s 1,712 out of the 2,382 necessary for the Democratic presidential nomination.