Opinion

Party favors

Once again, New York’s minor political parties threaten to complicate this year’s gubernatorial race.

The left-leaning, union-backed Working Families Party, which let itself be shanghaied four years ago into backing Andrew Cuomo for governor, is now signaling it may run a candidate against him.

Meanwhile, John Catsimatidis, the supermarket mogul who lost last year’s GOP mayoral primary to Joe Lhota, is offering to bankroll a revival of the long-dead Liberal Party — and give Gov. Cuomo the Liberal line on the state ballot.

As our readers know, The Post has little common ground with the WFP, which acts as another political arm for the unions. But in seeking to to run its own candidate against an incumbent Democratic governor, the WFP is doing exactly what a third party should be doing: offering an alternative.

That’s in sharp contrast to the Catsimatis effort over at the Liberal Party, which far from giving voters more choice only gives the Democratic incumbent an extra line on the ballot.

We have nothing against minority parties that offer real alternatives to Democrats and Republicans. In New York, alas, they have generally operated less as an alternative and more as fully paid subsidiaries. And that’s largely because of New York’s near-unique system, which allows cross-endorsements.

The history of third-party candidates in America, of course, suggests they triumph rarely and in highly exceptional circumstances. Then again, they are not primarily about winning.

Primarily they are about pushing Democrats or Republicans in a certain direction — or punishing them when they have strayed too far from principles important to a significant number of their supporters.

In New York, a third party that runs its own candidate takes a risk. That’s because a party must draw 50,000 votes in the gubernatorial race to keep its automatic line. The less well-known a third-party candidate, the less likely he or she will meet that threshold — and enable the party to keep its coveted line on the ballot. Which is why New York’s minor parties have largely devolved from movements of principle into often-corrupt ­patronage mills.

Reviving the Liberal line, which has been off the ballot since 2002, would be convenient for Cuomo. But it serves no pressing need and offers no alternative. It’s a reminder that when politicians can get more than one line on a ballot, they are the ones who benefit, not the voter.