Gov. Chris Christie rejected a bill allowing same-sex marriage in New Jersey by quickly vetoing the measure Friday and renewing his call for a ballot question to decide the issue.

The veto came a day after the state Assembly passed the bill. The state Senate had passed it on Monday. Christie, a Republican who opposes same-sex marriage, had vowed "very swift action" once the measure reached his desk.

In returning the bill to the Legislature, Christie reaffirmed his view that voters should decide whether to change the definition of marriage in New Jersey. His veto also proposed creating an ombudsman to oversee compliance with the state's civil union law, which same-sex couples have said is flawed and promotes discrimination.

"I am adhering to what I've said since this bill was first introduced _ an issue of this magnitude and importance, which requires a constitutional amendment, should be left to the people of New Jersey to decide," Christie said in a statement. "I continue to encourage the Legislature to trust the people of New Jersey and seek their input by allowing our citizens to vote on a question that represents a profoundly significant societal change. This is the only path to amend our State Constitution and the best way to resolve the issue of same-sex marriage in our state."

Democrats who had pushed the bill forward said they were disappointed, but not surprised, by Christie's action.

"He had a chance to do the right thing, and failed miserably," Senate President Steve Sweeney said.

Lambda Legal, a civil rights organization focusing on gay rights issues that last year filed a lawsuit for marriage equality in New Jersey, called Christie's veto "an unfortunate detour" in the quest for gay marriage.

Proponents of the bill said gay marriage is a civil right being denied to gay couples, while opponents said the definition of marriage as a heterosexual institution should not be expanded. The legislation contains a religious opt-out clause, meaning no church clergy would be required to perform gay marriages and places of worship would not have to allow same-sex weddings at their facilities.

Another gay marriage supporter, Washington state Democratic Gov. Chris Gregoire, also reached out to Christie, a practicing Catholic. Gregoire sent the governor a letter last month offering to talk about gay marriage because, in her words, "while I am a Governor, I am also a Catholic."

The Roman Catholic Church opposes same-sex marriage.

Gregoire signed a gay marriage measure into law in Washington on Monday. Her spokeswoman, Karina Shagren, said Christie hasn't responded to the letter.

Thirty states, including South Carolina, have adopted constitutional amendments banning same-sex marriages, most by defining marriage as a union between a man and a woman.

Six states and Washington, the capital district, allow gay marriage. Washington state's new gay marriage law is set to go into effect in June.

Lawmakers in New Jersey have until the end of the legislative session in January 2014 to override the veto.

Democrats are hoping that support for gay marriage _ 52 percent for gay marriage, 42 against it, in New Jersey, according to one recent voter poll _ will continue growing.