President Bush says legalizing gay marriage would redefine the most fundamental institution of civilization and that a constitutional amendment is needed to protect it.
A few activist judges and local officials have taken it on themselves to change the meaning of marriage, Bush said Saturday in his weekly radio address.
Leading the chorus of support for an amendment, Bush said, "If courts create their own arbitrary definition of marriage as a mere legal contract, and cut marriage off from its cultural, religious and natural roots, then the meaning of marriage is lost and the institution is weakened."
His remarks follow the opening of Senate debate Friday on a constitutional amendment effectively banning gay marriage.
Reflecting the election-year sensitivity of the issue, Sen. Patrick Leahy, D-Vt., said Republicans are using the constitutional amendment as a bulletin board for campaign sloganeering.
Sen. Orrin Hatch, R-Utah, accused Democratic presidential candidate John Kerry of holding inconsistent positions.
Kerry and running mate Sen. John Edwards oppose gay marriage, but support civil unions.
Bush says a constitutional amendment is needed to protect the traditional definition of marriage.
Bush singled out Massachusetts' Supreme Judicial Court, which called marriage an evolving paradigm. "That sends a message to the next generation that marriage has no enduring meaning, and that ages of moral teaching and human experience have nothing to teach us about this institution," he said.
The president urged the House and Senate to send to the states for ratification an amendment that defines marriage in the United States as a union of a man and woman as husband and wife.
Senate Democrats signaled they will not throw barriers in front of the resolution, paving the way for a vote on the amendment as early as next Wednesday.
A constitutional amendment should never be undertaken lightly, Bush said, "yet to defend marriage, our nation has no other choice."
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The vote puts some Democrats and Republicans in a difficult position. One senator acknowledged the political risk in trying to walk a line supporting both traditional marriage and gay rights.
"I intend to be your champion on many issues in the future, if you want me," Sen. Gordon Smith, R-Ore., said in remarks directed at gay and lesbian voters. Smith is a leader in efforts to make attacks against homosexuals a federal hate crime.
The Human Rights Campaign, the nation's largest gay political organization, said the president and congressional allies "should focus on the priorities of the American people, not the agenda of their extremist base."