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FILE - In this July 4, 1967 file photo Kay Tobin Lahusen, right, and other demonstrators carry signs calling for protection of homosexuals from discrimination as they march in a picket line in front of Independence Hall in Philadelphia. In 2019, same-sex marriage is the law of the land in the U.S. and at least 25 other countries. LGBT Americans serve as governors, big-city mayors and members of Congress, and one _ Pete Buttigieg _ is waging a spirited campaign for president. (AP Photo/John F. Urwiller)