The evening featured a smorgasbord of figureheads from the so-called Resistance, a group of actual celebrities and those who command the spotlight on Bluesky: the actors Robert De Niro and Mark Ruffalo, the conservative lawyer turned Trump hater George Conway, the former Trump national-security official Olivia Troye, the voting-rights activist Stacey Abrams, and the former CNN anchor Jim Acosta. Several members of Congress also showed up, forfeiting their seats in the House chamber—where House Minority Leader Hakeem Jeffries had urged attendees to engage in “silent defiance”—to be part of something louder and more brazen.