Bill de Blasio is holding off on endorsing Hillary Clinton for the 2016 Democratic nomination, saying he first wants to see her vision for America.

The New York City mayor, who ran Clinton's 2000 Senate campaign, said on "Meet the Press" Sunday, "I think, like a lot of people in this country, I want to see a vision. And, again, that would be true of candidates on all levels. It's time to see a clear, bold vision for progressive economic change."

Clinton is a tremendous public servant and one of the most qualified people to run for president, de Blasio said. 

"But we need to see the substance," he stated.

"She doesn't need to be vetted. I think we can safely say that. But I think she has to address the issues, and that could be done with or without a primary."

Watch Ed Henry share insight on Clinton's candidacy in the clip above.

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