A spokesperson for Hillary Clinton Hillary Diane Rodham ClintonSanders: 'I fully expect' fair treatment by DNC in 2020 after 'not quite even handed' 2016 primary Sanders: 'Damn right' I'll make the large corporations pay 'fair share of taxes' Former Sanders campaign spokesman: Clinton staff are 'biggest a--holes in American politics' MORE says she is "perfectly willing" to debate Democratic presidential rival Bernie Sanders Bernard (Bernie) SandersPush to end U.S. support for Saudi war hits Senate setback Sanders: 'I fully expect' fair treatment by DNC in 2020 after 'not quite even handed' 2016 primary Sanders: 'Damn right' I'll make the large corporations pay 'fair share of taxes' MORE in New York.

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Brian Fallon said during an interview on Bloomberg TV's "With All Due Respect" on Tuesday that Clinton is open to holding a debate before the state's April 19 primary.

"If they can find a mutually agreeable date in the next couple of weeks before New York, I think it could happen," Fallon added.

During a campaign stop in LaCrosse, Wis., on Tuesday, Clinton told reporters she was open to the idea of debating but didn't suggest a date, according to the New York Daily News.

Sanders seized on the apparent openness, saying later on CNN, "Let's do it."

The campaigns have been sparring for days over whether to hold a debate in the coming weeks, with the Sanders campaign issuing a letter over the weekend suggesting Clinton is afraid to debate.

Clinton's chief strategist, Joel Benenson, suggested Monday that a debate hinged on the "tone" the Vermont senator adopted, while Sanders's campaign has continued to attempt to pressure Clinton.

Clinton released a new campaign ad Wednesday aimed squarely at Republican rival Donald Trump Donald John TrumpHouse committee believes it has evidence Trump requested putting ally in charge of Cohen probe: report Vietnamese airline takes steps to open flights to US on sidelines of Trump-Kim summit Manafort's attorneys say he should get less than 10 years in prison MORE in New York ahead of the state's primary.

--This report was updated at 11:32 a.m.