More New York City voters oppose than support Mayor Bill de Blasio's re-election in 2017, a Quinnipiac University Poll showed Wednesday.

The survey found 47 percent of voters say de Blasio does not deserve a second term, and 41 percent believe he does. The poll showed 53 percent of Democrats favor his re-election and 35 percent are against it.

"The election calendar keeps getting shorter," assistant poll director Maurice Carroll said. "Mayor Bill de Blasio has to be concerned that his re-election numbers are narrowly negative."

Carroll pointed out, however, that no major contenders have signaled an intention to challenge de Blasio. "Who knows who'll be running a couple years from now," he said.

De Blasio is at a low point among city voters, with 44 percent disapproving of how he handles his job -- his worst negative rating since taking office in January 2014, the poll showed.

A de Blasio spokesman brushed off the poll results.

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"This is a mayor who focuses on the fundamentals New Yorkers care about, not political chatter," Wiley Norvell said, citing lower overall crime, increased affordable housing and more job creation.

Quinnipiac surveyed 1,108 city voters via landline and cellphone between July 30 and Tuesday. It has a margin of error of plus or minus 2.9 percentage points.

The poll found 53 percent of voters say de Blasio's involvement in national issues has distracted him from his duties, and 53 percent disapprove of his handling of poverty and homelessness. He gets a better rating -- 56 percent -- for being seen as honest and trustworthy.

The Democratic mayor's support remains high in minority communities. Among black voters, 58 percent say he deserves to stay at City Hall, and 64 percent approve of his job performance. Hispanic voters back his re-election by 49 percent; 48 percent approve of him.

Among white voters, however, 59 percent disapprove of how he leads the city, and 61 percent oppose a second term.

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Comptroller Scott M. Stringer, also a Democrat, has the highest approval ratings among citywide elected officials, with 54 percent. He has flirted in the past with a mayoral bid, but his campaign has said he is running for re-election in 2017.

Gov. Andrew M. Cuomo has a 58 percent job approval and 36 percent disapproval rating, the poll showed. Voters are split in Cuomo's feud with de Blasio over the city's largely failed agenda in the state legislative session. Although 39 percent say de Blasio did not work hard enough, 41 percent say Cuomo undermined de Blasio.