Courts handed victories to gay-marriage opponents in two states Friday, reinstating Nebraska's voter-approved ban on same-sex marriage and throwing out an attempt to keep a proposed ban off the ballot in Tennessee.

In the Nebraska case, the 8th U.S. Circuit Court of Appeals overturned a judge's ruling last year that the ban was too broad and deprived gays and lesbians of participation in the political process, among other things.

Seventy percent of voters had approved the ban as a constitutional amendment in 2000.

It went farther than similar bans in many states in that it also barred same-sex couples from many legal protections afforded to heterosexual couples. For example, the partners of gays and lesbians who work for the state are not entitled to share their health insurance and other benefits.

Click here to read the Nebraska ruling.

New York-based Lambda and the ACLU's Lesbian and Gay Project sued, arguing it violated gay rights.

The court, however, ruled that amendment "and other laws limiting the state-recognized institution of marriage to heterosexual couples are rationally related to legitimate state interests and therefore do not violate the Constitution of the United States."

In Tennessee, the state Supreme Court dismissed a lawsuit filed by the American Civil Liberties Union that contended the state failed to meet its own notification requirements for a ballot measure asking voters to ban gay marriage. The high court ruled unanimously Friday that the ACLU didn't have standing to file the suit.

Tennessee already had a law banning gay marriage, but lawmakers who supported the proposed amendment said they wanted a backup in case the law was overturned.

Similar steps have been taken in many of the other 44 states that have specifically barred same-sex marriage through statute or constitutional amendment.

Only Massachusetts allows gay marriage, acquired through a ruling by the state's high court. Vermont and Connecticut allow same-sex civil unions that confer the same legal rights as heterosexual married couples.

But even in Massachusetts, lawmakers are trying to ban gay marriage, and the high court ruled this week that legislative efforts to put a gay-marriage ban on the state's 2008 ballot could move forward. The top courts in two other states also dealt gay rights advocates setbacks last week: The New York court rejected a bid by same-sex couples to win marriage rights, and the Georgia court reinstated a constitutional amendment banning gay marriage there.

David Buckel, senior staff attorney at Lambda Legal, said Nebraska's ban is "the most extreme of all the anti-gay family laws in the nation" and his group is considering asking the appeals court to rehear the case.

He said the court ignored the claims raised in the lawsuit.

"We did not sue about marriage, we sued because our clients were told it was a waste of time to try to get a domestic partnership bill passed" in the Legislature," he said. "Yet the court is reasoning as if what we asked for was the right to marry."

Nebraska Attorney General Jon Bruning countered that no one's freedom of expression or association was violated.

"Plaintiffs are free to petition state senators to place a constitutional amendment on the ballot," Bruning said. "Plaintiffs are similarly free to begin an initiative process to place a constitutional amendment on the ballot, just as supporters ... did."