Gay marriage laws in the US

Vermont lawmakers on Tuesday voted to override the governor's veto of a bill allow gay men and lesbians to marry. Here's where things stand nationally:

SAME-SEX MARRIAGE:

Vermont's vote marked the first time a legislature enacted it into law. Last week, the Iowa Supreme Court ruled that marriage couldn't be restricted to unions of a man and a woman, following the lead of Connecticut and Massachusetts, both of which approved it as a result of high court decisions.

California briefly allowed gay marriage last year, but a voter initiative in November repealed it.

CONSTITUTIONAL BANS:

Voters in 29 states have approved state constitutional amendments that ban gay marriage: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Georgia, Florida, Idaho, Kansas, Kentucky, Louisiana, Michigan, Mississippi, Missouri, Montana, Nebraska, Nevada, North Dakota, Ohio, Oklahoma, Oregon, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Wisconsin.