FILE - In this March 1, 2012 file photo, Maryland Gov. Martin O'Malley signs the Civil Marriage Protection Act in Annapolis, Md., becomingthe eighth state to legalize same-sex unions. On Tuesday, the ... more 
FILE - In this March 1, 2012 file photo, Maryland Gov. Martin O'Malley signs the Civil Marriage Protection Act in Annapolis, Md., becomingthe eighth state to legalize same-sex unions. On Tuesday, the US Supreme Court will begin hearing two days of cases involving gay marriage. (AP Photo/Patrick Semansky, File) less 
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Associated Press | Photo By Patrick Semansky, File
Tue, Mar 26, 2013 8:46 AM EDT