Democrat Jessica Ramos has taken another step in her run against Sen. Jose Peralta, filing a campaign committee with the Board of Elections.

Ramos, a former aide in New York City Mayor Bill de Blasio’s office, is launching the primary bid against Peralta, one of the members of the Independent Democratic Conference.

The campaign comes amid a push to unify the eight-member IDC and the 23-member mainline Democratic conference in the state Senate. Other IDC members are expected to face primary challenges as well. If the IDC reneges on the agreement to form a Democratic majority in May, the state committee will back the primary bids. If mainline Democrats back out of the deal, the state committee will seek leadership changes in the conference.

The unsteady truce has to hold until the spring, when special elections are held to fill coming vacancies in the state Senate. Both factions of Democrats are meant to work together to win those seats.

A spokesman for the Democratic Senate Campaign Committee said primaries against IDC incumbents are not being supported, citing the agreement in place.