FILE - In this Tuesday, July 21, 2020, file photo, Democratic presidential candidate, former Vice President Joe Biden speaks at a campaign event at the Colonial Early Education Program at the Colwyck Training Center, in New Castle, Del. The 2020 spotlight is about to shift, at least temporarily, away from President Donald Trump and onto Biden. (AP Photo/Andrew Harnik, File)

WILMINGTON, Del. (AP) — Joe Biden named California Sen. Kamala Harris as his running mate on Tuesday, making history by selecting the first Black woman to compete on a major party’s presidential ticket and acknowledging the vital role Black voters will play in his bid to defeat President Donald Trump.

In choosing Harris, Biden is embracing a former rival from the Democratic primary who is familiar with the unique rigor of a national campaign. Harris, a 55-year-old first-term senator, is also one of the party’s most prominent figures and quickly became a top contender for the No. 2 spot after her own White House campaign ended.

Harris joins Biden in the 2020 race at a moment of unprecedented national crisis. The coronavirus pandemic has claimed the lives of more than 150,000 people in the U.S., far more than the toll experienced in other countries. Business closures and disruptions resulting from the pandemic have caused an economic collapse. Unrest, meanwhile, has emerged across the country as Americans protest racism and police brutality.

Trump’s uneven handling of the crises has given Biden an opening, and he enters the fall campaign in strong position against the president. In adding Harris to the ticket, he can point to her relatively centrist record on issues such as health care and her background in law enforcement in the nation’s largest state.

Harris’ record as California attorney general and district attorney in San Francisco was heavily scrutinized during the Democratic primary and turned off some liberals and younger Black voters who saw her as out of step on issues of systemic racism in the legal system and police brutality. She tried to strike a balance on these issues, declaring herself a “progressive prosecutor” who backs law enforcement reforms.

Biden, who spent eight years as President Barack Obama’s vice president, has spent months weighing who would fill that same role in his White House. He pledged in March to select a woman as his vice president, easing frustration among Democrats that the presidential race would center on two white men in their 70s.