Joseph R. Biden Jr. on Wednesday lashed out at his Democratic rivals who had condemned his fond recollections of working relationships with segregationists in the Senate, declining to apologize and defending his record on civil rights. The angry exchange shattered, at least for now, the relative comity that had marked the Democratic presidential primary.

Until Wednesday, many of the Democratic candidates had largely taken oblique swipes at Mr. Biden, while the former vice president sought to stay above the fray, training his sights on President Trump instead.

But a day after he invoked the 1970s, an era when he said he could find common ground with other senators — even virulent segregationists — his opponents offered their sharpest criticism yet.

Senator Kamala Harris of California said the former vice president “doesn’t understand the history of our country and the dark history of our country,” and Senator Cory Booker of New Jersey said Mr. Biden should immediately apologize for using segregationists to make a point about civility in the Senate.

Joseph R. Biden Jr., defending himself on Tuesday night against suggestions that he is too “old fashioned” for today’s Democratic Party, invoked two Southern segregationist senators by name as he fondly recalled the “civility” of the Senate in the 1970s and 1980s.

Speaking at a fund-raiser at the Carlyle Hotel in New York City, Mr. Biden, 76, stressed the need to “be able to reach consensus under our system,” and cast his decades in the Senate as a time of relative comity. His remarks come as some in his party say that Mr. Biden is too focused on overtures to the right as he seeks the Democratic presidential nomination.

At the event, Mr. Biden noted that he served with the late Senators James O. Eastland of Mississippi and Herman Talmadge of Georgia, both Democrats who were staunch opponents of desegregation. Mr. Eastland was the powerful chair of the Senate Judiciary Committee when Mr. Biden entered the chamber in 1973.

“I was in a caucus with James O. Eastland,” Mr. Biden said, slipping briefly into a Southern accent, according to a pool report from the fund-raiser. “He never called me ‘boy,’ he always called me ‘son.’”

For Immediate Release

June 5, 2019

EMILY's List Statement on Biden's Support for Hyde Amendment

WASHINGTON, D.C. – In response to an NBC news story confirming Vice President Biden's support for the Hyde Amendment, EMILY's List President Stephanie Schriock released the following statement:

“At a time when reproductive rights are under consistent attack, it’s unacceptable that a major Democratic nominee supports the Hyde Amendment. This amendment, which blocks federal funding for abortion services with few exceptions and effectively bans abortion for women on Medicaid, which has a disproportionate impact on young women and women of color. Americans overwhelmingly support women’s rights to make their own health care choices and Democrats made repealing the Hyde Amendment part of our 2016 platform. We hope that Vice President Biden will reconsider this position and what it means to millions of women. There’s simply too much at risk.”