Gov. Andrew Cuomo is once again taking up the mantle of the Reproductive Health Act, a long-languishing bill meant to strengthen abortion rights in New York, as he runs for re-election.

But as he’s done so, his Democratic primary opponent Cynthia Nixon has questioned why Cuomo hasn’t been able to work the bill through the Republican-controlled state Senate. The context for it all has been the suggestion by the governor’s liberal critics that Cuomo has over the last seven years aided Republicans in keeping the majority through the Independent Democratic Conference at the expense of passing the bill.

But the politics surrounding the bill have always been especially hot at the Capitol, and even with a vote forced onto the floor, it was never clear if the bill could pass in the chamber.

The IDC aside, the mainline conference in the state Senate had one lawmaker up until 2017 who opposed abortion rights: Ruben Diaz, Sr. of the Bronx.

That made moving on the RHA an especially heavy lift, even through a hostile amendment.

Diaz is now on the New York City Council and the IDC dissolved in April, giving the Democratic conference 31 members and, in theory, 31 yes votes for the bill. It takes 32 lawmakers to pass a bill in the Senate, and supporters of reproductive rights have suggested there could be some Republicans who would vote for the RHA if it were allowed to the floor.

During Cuomo’s tenure, the RHA first became a conversation piece in 2013, when a version of the bill was included in the 10-point women’s agenda, which also included measures aimed at combating gender inequities in housing and the workplace.

Senate Republicans had opposed the package because of the abortion provision and refused to hold a vote on it — a combination of deeply held beliefs on the part of some lawmakers in the GOP conference, along with the influence exercised by the Conservative Party.

At the time, the IDC was only on year two, but the political pressure faced by Sen. Jeff Klein and the conference’s members was starting to mount over the RHA — a sign of things to come for how IDC members would be perceived by liberals.

Klein sought to force a hostile amendment at the end of the 2013 legislative session in June and it failed, with both Diaz and Sen. Simcha Felder, a Brooklyn Democrat who conferences with Republicans, voting against the measure.

The Senate chamber dramatics over the RHA returned earlier this year, with Lt. Gov. Kathy Hochul providing over the session in an attempt to gain a vote on the measure — a Democratic attempt to take advantage of short-changed Republicans in the Senate, now split at 31-31. After several days of wheel spinning, legislative maneuvering and surprising veto override engineered by Republicans, the effort once again did not gain much traction.

Suffice to say, the RHA has been a conundrum for an obvious reason: The emotions surrounding abortion cannot be compromised or traded on.

A minimum wage increase can be agreed to with different phase-in schedules. The details of a paid-family leave program can be open to negotiation.

And Cuomo could engineer a same-sex marriage vote in the Senate, in part, using a combination of leverage, deal making, negotiation and outside organizing to cut through the inertia.

Those circumstances, with the world as it is with a Republican Senate, haven’t been there for the RHA.