Iowa Republicans are steering clear of the issue of gay marriage, leaving supporters to wonder whether support is growing in the party.

The fight to repeal Iowa's law began the day the Iowa Supreme Court legalized it in 2009. Social conservatives vowed to take the issue to the people.

In 2010, lawmakers in the Republican-controlled House approved a constitutional amendment which sought to define marriage as a heterosexual union. But the effort has been blocked in the Senate by Majority Leader Mike Gronstal, who easily won re-election in November despite a high-profile effort to defeat him.

After a month in session, Republican lawmakers have yet to mount another attempt. They said their focus is elsewhere.

“We have already voted on that,” House Majority Leader Linda Upmeyer told the AP. “I don't know if a bill will be filed. It may or may not be. The Senate hasn't changed. The House hasn't changed. We will support the issue, but the Senate isn't going to take it up.”

Jeff Angelo, a former Republican senator who in 2011 launched Iowa Republicans for Freedom, which makes the conservative case for marriage equality, said he thinks the party is slowly shifting its views on the issue.

“I think there's growing support in the Republican ranks for same-gender marriage, particularly in a state where it is the law of the state. There has been no disaster visited on the state because there has been same-sex marriage,” Angelo said. “I think there are some that have friends, relatives that are gay that would rather just let this go.”

(Related: Iowa GOP chair describes democrats as “gay marriage party.”)