Gov. Andrew Cuomo, closely allied with the Senate Republican majority that once blocked gay marriage, says he's now optimistic it will be legalized in New York.
The Democrat says he believes the Senate will produce the 32 votes needed for passage in the six weeks remaining in the legislative session.
Both sides are girding for a showdown after the bill's surprising defeat in 2009.
More than 700 Protestant and Jewish clergy members endorsed same-sex marriage Tuesday, an attempt to blunt the opposition of Catholic leaders. A rally in support of legalization is planned for next week.
On the other side, Democratic Sen. Ruben Diaz plans a May 15 rally in the Bronx for what he says is defense of traditional marriage between a man and woman.