The Delaware Senate gave the final okay to a measure that clamps a moratorium on all new charter schools in Wilmington through 2018.
The measure now goes to the Governor for his signature.
But the Senate vote fell along party lines with Republicans charging that the measure is part of an anti-charter school movement in the state legislature.
The state House of Representatives and the Senate are controlled by Democrats.
The measure comes after the Wilmington Education Advisory Committee called for a temporary halt on additional charter schools in that city.
The Wilmington News Journal reports that originally the legislation had called for a statewide halt to new charter schools.
State Senator Margaret Rose Henry, a Democrat from the Wilmington area, told her colleagues that this would allow the state to catch its breath to assess the educational needs of the city.