(CNN) Democratic presidential candidate Sen. Bernie Sanders sidestepped questions Thursday about when he will release his tax returns, with the Vermont independent hinting he could fulfill his six-week old pledge to make public 10 years of tax returns on April 15 -- Tax Day.

Yet, as quickly as Sanders suggested that, he appeared to backtrack and wouldn't commit that he would release them then.

"Do you know what April 15th is? It's Tax Day," Sanders told CNN on Capitol Hill when asked if there was an issue to releasing his taxes. "So, I think we want to make sure we have all of them together and as I said, they will be released soon."

When asked if that meant he would not necessarily release his tax returns on April 15, Sanders responded, "That's it. Thank you very much."

An aide then stepped in front of CNN and said, "he answered your question" and referred CNN to follow up with a Sanders' spokesperson.

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