But for many voters, Proposition 107 is not black and white. Leticia Gil of Tucson feels strongly about preserving traditional marriage but thinks gay couples should get some kind of legal recognition.

The measure known as Protect Marriage Arizona is the most divisive and emotionally charged issue facing voters in November. Though same-sex marriage is illegal in Arizona, if the proposition passes, an article on marriage would be added to the state Constitution that could be changed only by another constitutional amendment.

To preserve and protect marriage in this state, only a union between one man and one woman shall be valid or recognized as a marriage by this state or its political subdivisions and no legal status for unmarried persons shall be created or recognized by this state or its political subdivisions that is similar to that of marriage."

The institution of marriage is under attack and needs protection from activist judges who may seek to redefine it. Marriage between one man and one woman is the building block of society and good for families.

Proposition 107 could affect other political campaigns, including the race for governor. Around the country, similar measures have helped bring out the Religious Right in support of the campaigns of conservative candidates such as President Bush.

Same-sex marriage is illegal in Arizona, campaign spokeswoman Jeanine L'Ecuyer said. The governor believes that the measure goes too far and could have a number of unintended consequences.

Napolitano, who has never been married or had children, has long been the subject of a whisper campaign about her sexuality, including some dirty campaign tricks in 2002 when "vote gay" fliers were posted next to her campaign signs. She is not gay, she has said, "just a straight, single workaholic." Similar accusations could emerge again in this campaign, especially with Proposition 107 on the ballot.Republican challenger Len Munsil has made his mark on state politics as a social conservative, championing a "family values" agenda that is anti-abortion and anti-gay marriage. He founded the Center for Arizona Policy, which is the key state backer of the initiative. He also wrote the state law that bans gay marriage and credits himself on his Web site as "an architect" of Proposition 107.

While gay marriage is not quite the hot-button issue it was in 2004, it still could motivate some social conservatives to come to the polls. If members of the Religious Right turn out to vote, they'll likely vote for Munsil.

Proposition 107 has brought Arizona to the front line in the national battle over same-sex marriage. Big names and national groups have poured money and resources into the fight in Arizona. Here's a guide to the major players.

, a conservative advocacy group based in Phoenix, is leading the charge in favor of Proposition 107. The group, founded by Republican gubernatorial nominee , is now led by , who is also spokeswoman for the campaign. , a prominent campaign consultant, is advising both the Protect Marriage campaign and Munsil's campaign for governor.

The campaign has received legal support from the , a group founded by . The Scottsdale-based Christian legal group has played a major role in court battles over gay marriage and in lawsuits over constitutional amendments around the country.

The campaign has received funding from , a national non-profit whose state chapter president is (wife of Arizona GOP Chairman ), and the of Phoenix, an adoption and family counseling agency.

is the group organized to defeat Proposition 107. The coalition is headed by state , a Phoenix Democrat. , the coalition's treasurer, is a former Republican lawmaker and co-chairman of the , a gay and lesbian rights organization.

, chairman of Democrat U.S. Senate campaign, and , a long-time Republican political strategist, are campaign consultants. The campaign's Internet strategist is , who is also working for and .

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