As Democrats head into their two-day nominating convention on Long Island, a new poll confirms that Gov. Andrew Cuomo would indeed have a problem on his left if the Working Families Party decides to go its own way in the general election this November.

A Q poll released this morning shows Cuomo with a 57-28 lead over his GOP challenger, Westchester County Executive Rob Astorino, who was nominated by his party last week in Rye Brook.

But that lead shrinks to 37-24 if a more “liberal or progressive” candidate runs on the Working Families line, with said unnamed candidate receiving some 22 percent of the vote.

Cuomo’s support among Democrats drops from 87 percent in the two-way matchup to 55 percent in the hypothetical three-way race, with 27 percent of Democrats for the anonymous Working Families Party candidate and 15 percent undecided.

The Q poll results nearly mirror a Siena poll released late last month, which found a WFP candidate reducing Cuomo’s lead over Astorino to 15 percentage points.

According to today’s poll, New York voters approve 59 – 32 of the job Cuomo is doing as governor, compared to 63 – 28 percent in February. Fifty-five percent say he deserves to be re-elected.

Twenty-seven percent of poll respondents described Cuomo as “too liberal,” while 14 percent say he is “too conservative” and 49 percent say he is “about right.”

Astorino’s biggest problem remains the fact that he is unknown to most New Yorkers outside of his home base – a whopping 74 percent said they don’t know enough about him to form an opinion, which Q pollster Mickey Carroll called “a big plus for Cuomo.”

With $33 million and counting worth of political cash in the bank, Cuomo has a significant advantage over Astorino in the way of resources, and can use that money to define his opponent as a far right conservative who’s out-of-step with most New Yorkers before Astorino gets a chance to make his own case.

The WFP’s convention will be held outside Albany on May 31.

The question there is whether the rank-and-file activists, who are unhappy with Cuomo for his fiscal conservatism and lack of movement on progressive issues – mainly creation of a public campaign finance system – will buck party and labor leaders who are more pragmatic and want to endorse the governor for re-election.

It appears unlikely at this moment that a campaign finance deal will be reached between Cuomo and legislative leaders before the WFP meets to consider the endorsement, which means activists will be asked to trust that the governor can deliver – something about which they have grown wary after four-plus years of lip service on this issue and very little actual movement.

As for the other two statewide elected Democrats who will be nominated for re-election today…

– State Attorney General Eric Schneiderman is leading his GOP challenger, John Cahill, 46-27, with 24 percent undecided.

Fifty-nine percent of voters said they hadn’t heard enough about Schneiderman to have an opinion of him, but it’s even worse for Cahill – 78 percent of voters said they have no idea who he is.

– Fifty percent of New Yorkers polled said they would pick state Comptroller Tom DiNapoli over “the Republican candidate” (for some reason, the GOP nominee in this race, Onondaga County Comptroller Bob Antonacci, was not mentioned by name).

However, 49 percent said they didn’t know if DiNapoli should be re-elected, and 52 percent couldn’t say if they approve or disapprove of the way he’s handling his job as the state’s chief bean counter.

May 21 Q poll. by liz_benjamin6490