As party unity talks swirl publicly and privately, Senate Democrats eyed Bronx Councilman Jimmy Vacca as an ideal candidate to challenge Independent Democratic Conference Leader Jeff Klein in a primary, documents obtained by Capital Tonight show.

The analysis concluded Vacca “would clearly be the best candidate against Klein.”

A spokesman for Vacca on Tuesday said “he has no intention of running.”

More broadly, the analysis argued Klein is vulnerable in a Democratic primary next year and assessed his victory over former city Councilman Oliver Koppell.

“Klein is formidable, but vulnerable,” the report stated.

The report broke down the results of the 2014 Koppell challenge by council district and congressional district as well as by neighborhood. Klein handily defeated Koppell, also a former state attorney general, in the primary.

A spokesman for the Senate Democrats declined to comment.

IDC spokeswoman Candice Giove rebuffed the report.

“If Senator Gianaris and Senator Andrea Stewart-Cousins spent as much time analyzing senate districts that we could win as they do on their unhealthy obsession with Senator Jeff Klein, they would be much better served,” she said.

The report was quoted in The Daily News on Monday, which reported Deputy Senate Minority Leader Mike Gianaris had held discussions with potential candidates to primary Klein. Elements from the report first appeared in The Daily News.

The eight-member IDC is being pressured by liberals to rejoin or form an alliance with the mainline Democratic conference in the state Senate, where Republicans have a narrow hold on power. The GOP conference retains a majority with the aid of Brooklyn Democratic Sen. Simcha Felder, who is not an IDC member.

However, the IDC remains a key bloc of lawmakers in the chamber.

As the chairman of the Democratic Senate Campaign Committee, Gianaris is in charge of recruiting Democrats for the mainline conference.

The discussions and analysis of a Klein primary challenge come as Democrats have publicly and privately pushed for party unity in the Senate.

In July, Gov. Andrew Cuomo met with Democrats as part of a push to broker a peace in the chamber. In August, Cuomo met with both Senate Minority Leader Andrea Stewart-Cousins and Klein to discuss reunification.

“We always have a good conversation,” Stewart-Cousins told reporters on Monday in Albany.

She said potential primary pushes were not discussed.

Stewart-Cousins said the unification talks are separate from the political work of holding discussions with potential candidates.

“There are multiple things that always happen and something that always happens as it relates to the campaign committee is there are people who say they’re interested in running against that person. Senator Gianaris always meets with people out of respect, quite frankly. These are very different things. The ideal is Democrats come back together. I think that would be a great solution.”

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