MATTHEW LAVIETES AS the U.S. Democratic National Convention drew to a close, Pete Buttigieg, the party's first openly gay presidential candidate, took to the virtual stage to note the historic significance of his campaign. "The day I was born, close to where I'm standing here in South Bend, the idea of an 'out' candidate seeking any federal office at all was laughable," said Buttigieg, who came out in 2015 after being elected mayor of South Bend, Indiana, in 2012. "Yet earlier this year I campaigned for the presidency, often with my husband at my side, winning delegates to this very…