"... same-sex marriage has advanced so far as an issue that even Republicans like Knight, a senator from Palmdale, seem to be changing their minds. In 2000, California voters overwhelmingly approved Knight’s Proposition 22, which said the state would recognize only marriages between a man and a woman. Knight once wouldn’t even consider civil unions and expanded rights for domestic partners, but now he’s willing to compromise--under certain conditions. Since Proposition 22 passed in 2000, he's seen its power erode--most notably when his gay son recently got married in San Francisco. Today, Knight says he might be willing to accept...