After asserting they would work through the night if needed, the New York Senate adjourned on Thursday at roughly 11PM without a decision on a gay marriage bill.

The Senate is expected to reconvened on Friday at 10AM.

The Republican-controlled Senate remains the final hurdle for Governor Andrew Cuomo's plan to make New York the sixth – and most populous – state to legalize gay marriage.

Two Republicans have joined all but one Democrat, Senator Ruben Diaz Sr. of the Bronx, in endorsing the bill, leaving it deadlocked with a 31-31 vote. It's possible Lt. Governor Robert Duffy, a surrogate for Governor Cuomo, could break the tie, but such a move is certain to be challenged in court.

On Wednesday, several sources close to the GOP Senate caucus confirmed a third Republican vote had been “secured” for passage of the measure.

While the name of the third Republican has not been released, Senator James Alesi, who is officially undecided, on Thursday said he was confident the bill would pass if brought to the floor for a vote.

“It'll pass,” Alesi told NBC affiliate WGRZ. “It will definitely pass.”

Meanwhile, demonstrators on both sides of the issue packed the Senate hallways.

At a gay fundraiser in Manhattan, President Barack Obama said he supported New York's right to decide the issue.