Arizona has become a major flashpoint in the national debate over the boundaries between religious freedom and discrimination, as Gov. Jan Brewer vetoed a bill on Wednesday that would have given business owners a legal defense for refusing service to customers on religious grounds.

But the state is hardly alone in mulling more explicit protections for religious business owners and individuals, whose objections to same-sex marriage have come into increasing conflict with newer laws expanding the rights of gays and lesbians.

...