WASHINGTON — Setting the stage for a potentially historic ruling, the Supreme Court says it will decide whether same-sex couples nationwide have a right to marry under the Constitution.
The justices said Friday they will review an appellate ruling that upheld bans on same-sex unions in four states.
The case will be argued in April and a decision is expected by late June.
Kentucky, Michigan, Ohio and Tennessee are among the 14 states where gay and lesbian couples are not allowed to marry.
The number of …