Indiana Governor Mike Pence, a Republican, will be the keynote speaker at a meeting of social conservatives calling on lawmakers to approve a controversial constitutional amendment which seeks to prohibit Indiana from recognizing any union other than a heterosexual union.

Next Thursday's Faith and Community Leader Legislative Luncheon is sponsored by the Indiana Family Institute and its Indiana Pastors Alliance.

“The battle lines for the future of marriage are drawn,” Curt Smith, the group's president, said in announcing the upcoming event. “Your support and direct participation are vital. Please attend this pivotal meeting and bring others.”

The 13-member House Judiciary Committee on Monday will consider HJR-3, formerly HJR-6, which easily cleared the Republican-controlled House and Senate in 2011. A second vote is needed before the amendment can head to voters in November.

(Related: Indiana House panel to consider proposed gay marriage ban on Monday.)

Pence has previously voiced his support for the amendment.