Harris emerges from sidelines as Democrats rethink the ticket

Vice President Kamala Harris walks to board Air Force Two for a trip to New Orleans at Joint Base Andrews Friday in Maryland. (Erin Schaff/The New York Times)

Vice President Kamala Harris at the Essence Festival of Culture Saturday in New Orleans. (Erin Schaff/The New York Times)

Vice President Kamala Harris at the Essence Festival of Culture Saturday in New Orleans. (Erin Schaff/The New York Times)

Vice President Kamala Harris speaks at the Essence Festival of Culture Friday in New Orleans on Friday. (Erin Schaff/The New York Times)

By early this year, around the time a prosecutor called President Joe Biden a “well-meaning, elderly man with a poor memory,” Vice President Kamala Harris already knew something had to change.