Some notaries and judges will refuse to allow gays to register relationships
Mayor Stephanie Rawlings-Blake served as grand marshal
Mayor presides over ceremony for 19 couples
Pew Research Center surveyed 1,197 gay adults between April 11-29
Advocates applaud inclusion of LGBT-specific language
Louisiana Republican says measure would allow freedom of religion
Events included a panel discussion at the HRC building and 'La Fiesta' at Town with Carmen Carrera
The Washington Blade and Whitman-Walker Health co-sponsored an event following the parade
National Press Club gathering took place ahead of expected Supreme Court rulings
The annual event featured several performers, including Icona Pop, Cher Lloyd and Emeli Sandé
