An alert posted this week on the American Family Association’s website urges members to send one million e-mails to U.S. senators asking them to pass the Marriage Protection Amendment, expected to come to a Senate floor vote June 5.

On Feb. 8, the AFA posted a similar legislative update, but said the vote would take place in "early March."

Senate Majority Leader Bill Frist (R-Tenn.) told the Conservative Political Action Conference on Feb. 10 he would bring a constitutional amendment banning same-sex marriage to the floor for a vote on June 5.

Frist told conference participants the Marriage Protection Amendment is necessary to protect the majority of Americans, whom he said opposed same-sex marriage, from the "whims of activist judges," the Washington Post reported.

The proposed constitutional amendment failed in 2004 by a 227-186 vote in the House and in the Senate by a 48-50 vote.

Before it could become part of the Constitution, the amendment would need to be approved by a two-thirds majority in the U.S. House and Senate, and then ratified by 38, or three-fourths, of the state legislatures.