He's talking about Prop 8 in CA. The Mormon church has taken a somewhat controversial stand in favor of it. Well the stand isn't controversial per se, just that the church is getting involved in the debate--some people seem to have a problem with that.
Are the Mormons taking over CA any more than any other conservative group who's voting according to their beliefs?
The way I understand it (I don't live in CA), Prop 8 doesn't illegalize gays forming civil unions, it just wants to avoid watering down the word "marriage" to mean anything other than the union of a man and a woman.
For the record, I am Mormon and can see both sides of this issue since people close to me are gay and are following this issue very closely.
Perhaps it might seem like hair-splitting over semantics... but once you open up that door... what's next? People marrying their pets? People marrying their car, or their house, and making it legal and claiming legal benefits? I mean maybe it sounds stupid but it's opening up the door for all sorts of legal loopholes. So it's complicated and I'm not exactly sure where I stand on it yet... but it doesn't matter because I don't live in CA and I'm not voting on it anyway.
Proposition 8 is an initiative state constitutional amendment on the 2008 California General Election ballot, titled Eliminates Right of Same-Sex Couples to Marry. If passed, the proposition would "change the California Constitution to eliminate the right of same-sex couples to marry in California." A new section would be added stating "only marriage between a man and a woman is valid or recognized in California."