Vice president's POTUS campaign will provide a significant boost
Outgoing president leaves powerful legacy for LGBTQ equality
Announcement comes amid growing pressure from Democrats to step aside
Speakers included U.S. Rep. Ken Calvert (D-Calif.)
Calif. Democrat is frontrunner to win US Senate race
U.S. Sen. Tammy Baldwin (D-Wis.)'s Republican opponent among Tuesday speakers
HRC, GLAAD highlight vice presidential nominee's record
LGBTQ groups have condemned the shooting that took place in Pa.
RNC had not issued a new position manifesto since 2016
HRC: ‘We are proud to stand by our endorsement’ of the president
