Senior advisers say contrast between Biden and Trump will sharpen in 2024
Tolliver, Flores on importance of diversity in government
Munoz, Gifford view 2024 as existentially important
Voters turn out to defend abortion rights
Country's president signed Anti-Homosexuality Act in May
Group's national dinner taking place in DC on Saturday
First lady will also deliver remarks
Former vice president advisor will succeed Dianne Feinstein
Calif. Democrat elected to U.S. Senate in 1992
Pulse survivor Brandon Wolf among those who spoke
