After weeks of rumors, Long Island Republican Tom Croci made it official: He will be deploying with the U.S. Navy and will not seek a third term.

"I'll be going on military leave from the Senate," Croci said. "So, I'm not resigning, I'm just going out on leave. And it's part of my life."

Croci is the fourth Republican in a week to not seek re-election, leaving the party that controls the New York state Senate by just one vote in a potentially precarious position.

But Democrats are hardly united. For starters, the eight former members of a breakaway group that rejoined the Democrats last month are facing primaries. Jessica Ramos is challenging Jose Peralta in Queens and released had a video ad, criticizing the problems with the 7 train.

A spokesperson for Peralta credits the senator for helping secure $800 million in aid for subways this year.

Gov. Andrew Cuomo is also facing a Democratic primary from actor Cynthia Nixon, who has looked to pin poor subway service on him with the hashtag #CuomosMTA.

But Ramos doesn't seem to be coordinating much with Nixon. Sources say that's because Ramos is hoping to stay close to the Queens County Democratic machine, which is strongly behind Cuomo.

Then there is Simcha Felder, the Brooklyn Democrat who conferences with Republicans and gives them their one seat majority.

"I think that all kinds of pressure should be brought on Simcha Felder," Nixon said Tuesday.

But while Cuomo wrote Felder a letter last week asking him to join fellow Democrats in the numerical majority, he seems resigned that it may not happen and not much will get done in Albany these last two months of session.

"Nothing will happen, and these reforms won't happen," the governor said last week. "It's all on him. If there is pressure, it's all on him."

People close to Cuomo suggest that he is actively working to recruit a primary challenger to Felder, although it's unclear where exactly that stands.

Felder already has a primary challenger in newcomer Blake Morris, but there doesn't seem to be much enthusiasm for him from party leadership.