In a marathon session Friday lasting till 10PM, Arizona lawmakers approved a measure to send a constitutional amendment banning gay marriage to the November ballot. If approved, the amendment would alter the State's constitution to limit marriage between only a man and a woman. The legislation had missed several key votes earlier in the week and was assumed defeated.

A similar measure was rejected by voters in 2006.

Arizona already bans gay marriage by law. But a constitutional amendment would prohibit the Arizona Supreme Court from overturning the 1996 state law.

In May, the California Supreme Court overturned a state law banning gay marriage leading to a flood of gay marriages in the state. California and Florida voters will also vote on a gay marriage constitutional amendment in the fall.

In a statement to the Protect Marriage campaign, one of the groups advocating the amendment, presumptive Republican Presidential nominee Senator John McCain said he supported the California measure: “I support the efforts of the people of California to recognize marriage as a unique institution between a man and a woman, just as we did in my home state of Arizona. I do not believe judges should be making these decisions.”

McCain had also endorsed the failed Arizona 2006 gay marriage amendment. It is widely believed that he will also back the new measure.