New York City Mayor Michael Bloomberg said Thursday that he believes the Senate will approve a gay marriage bill with several votes to spare, but Republican Senate leaders emerged from a closed-door meeting saying they had yet to decide whether to bring the measure to the floor for a vote.

Bloomberg flew up to Albany to lobby for Governor Andrew Cuomo's plan to make New York the sixth – and most populous – state to legalize gay marriage. The Republican-turned-independent lawmaker who as the biggest donor to the Senate Republican caucus yields quite a bit of influence over the chamber sounded upbeat in speaking to reporters, The New York Times reported.

“I still believe if they do vote their hearts and principles, New York State will become the next state to adopt marriage equality,” Bloomberg said. “Because based on my conversations with senators, I believe that if the bill comes to the floor, it will pass. And I'm very hopeful that will be any day now.”

The Democrat-controlled Assembly on Wednesday, as expected, approved the gay marriage bill, but Democrats weren't united on the issue. Two Senate Republicans have so far endorsed the measure – deadlocking the bill with a 31-31 vote – and others say they remain undecided.

In his remarks, Bloomberg named three Republicans he had spoken with on the issue: Andrew Lanza, John J. Flanagan and Mark J. Grisanti.

Senator Thomas Libous told the paper that Bloomberg spoke “passionately” on the issue.

Senate Majority Leader Dean G. Skelos told reporters as he left the Republican conference that he was headed to meet with Governor Cuomo.

(Related: Bloomberg delivers major speech in support of gay marriage.)