A resolution that seeks to ban gay marriage in Pennsylvania was introduced on Monday.

Republican Representative Daryl Metcalfe's proposal would amend the Pennsylvania Constitution to ban recognition of any “substantial equivalent” to heterosexual marriage.

“The institution of traditional marriage has never been under greater attack,” Metcalfe said in a statement. “This not only includes the special interests who want to permanently redefine marriage, but unfortunately the executive branch and the federal Department of Justice who have blatantly and recklessly refused to uphold and defend its constitutionality. Once again, it falls to the responsibility of state lawmakers to restore the rule of law and carry out the will of the people.”

The question could appear on the 2013 ballot, if approved by two consecutive sessions of the Legislature.

The measure was forwarded to the House State Government Committee, which Metcalfe chairs, and enjoys the support of 35 House Republicans, including Metcalfe, and one Democrat, R. Ted Harhai.

Last year, three Republican senators crossed the aisle to help defeat a similar measure sponsored by Senator John H. Eichelberger, Jr.

Currently, Pennsylvania bans gay marriage by law. Opponents say the institution remains vulnerable to a legal challenge without a constitutional amendment.

According to a report by the Human Rights Campaign, the nation's largest gay rights advocate, a slim majority of Pennsylvania voters (51%) support marriage equality.

Also considering a similar amendment are lawmakers in Indiana, Minnesota and North Carolina. A push in Iowa, where gay marriage was legalized in 2009, died this year in Iowa.