Labor leaders are eyeing a Joe Biden victory in November as the start of a union revival, one with the potential to undo decades of policies that have diminished union influence, undermined the right to organize and exacerbated income inequality.

And they’re planning on playing a central role.

“It’s clear to me it’s going to be the most significant pro-labor, pro-worker administration in a long, long, long time,” said Harold Schaitberger, president of the International Association of Fire Fighters — the first union to endorse Biden during the Democratic primary.

Reversing America’s decades-long decline in union membership, however, will be a difficult task for even the most labor-friendly administration. Just over 10 percent of workers were represented by unions last year, according to Labor Department data — a share that has been cut in half since 1983.