Story highlights The D.C. Democratic chair is confident Bernie Sanders will be on the presidential primary ballot

The District is strongly Democratic so it's a key race for Sanders and rival Hillary Clinton

Washington (CNN) Anita Bonds, chairwoman of the Washington, D.C. Democratic Party, said Wednesday she was confident presidential candidate Bernie Sanders would appear on the primary ballot, despite a challenge filed with the city's Board of Elections.

"Bernie will be on the ballot," Bonds told CNN.

Her comments come after NBC 4 in Washington reported the local Democratic Party filed paperwork for Sanders a day late to the Washington Board of Elections and a challenge was filed against Sanders. It's the first time Bond said she has heard of a candidate being challenged.

But the Sanders campaign also said it was confident he would appear on the ballot.

"We did what the D.C. law requires in order to get Bernie on the ballot and we are confident he will be on the ballot," Sanders spokesman Michael Briggs said Wednesday.

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