NYC Mayor Praises Hillary Clinton, But Does Not Offer Her Campaign His Endorsement

— -- New York City Mayor Bill de Blasio praised his former boss, Hillary Clinton, this morning, calling her an "extraordinarily capable" person and dismissed talk that her campaign is in decline, but did not offer her his endorsement for her presidential campaign.

"I think she's running a very good campaign because her vision is getting stronger and stronger," the mayor said this morning on "This Week."

The mayor, who ran Clinton's first campaign for Senate, cited a few policy positions he wanted the former secretary of state to expand upon.

"I think the issue of wages and benefits we need to hear a little more on, certainly on the trade issue. But I do want to say, since she announced, she has consistently put forward a stronger and stronger vision, literally each week, and that's very encouraging," he said to ABC News' George Stephanopoulos.

De Blasio also outlined his reasoning for not supporting a potential presidential bid by Vice President Joe Biden.

"I think we have great candidates right now, I really do. I'm very comfortable with the candidates we have. I think the Democratic debate is a constructive, positive one. I think with the candidates we have, we'll do very well," the mayor said.

The mayor used his appearance to take the Republicans seeking the White House to task for their "divisive visions."

"The Republican field is not only attacking each other, they're offering very divisive visions about this country that I think are actually going to turn off a lot of the American people," he said.