In an eagerly awaited landmark decision, the state's highest court ruled today that Governor Mitt Romney and Attorney General Thomas F. Reilly had the authority to invoke a 1913 state law that Massachusetts used to block out-of-state gay couples from marrying here when same-sex marriage became legal in 2004. The Supreme Judicial Court upheld the 1913 law when it was used to block same sex-couples from Connecticut, Maine, New Hampshire, and Vermont, because gay marriage is prohibited in those states. The court, however, did not rule on the claims of the couples from New York and Rhode Island because state...