Joseph I. Lieberman, Connecticut’s four-term United States senator and Vice President Al Gore’s Democratic running mate in the 2000 presidential election, which was won by George W. Bush and Dick Cheney when the Supreme Court halted a Florida ballot recount, died on Wednesday in Manhattan. He was 82.

His family said in a statement that the cause was complications of a fall. His brother-in-law Ary Freilich said that Mr. Lieberman’s fall occurred at his home in the Riverdale section of the Bronx and that he died at NewYork-Presbyterian Hospital in Upper Manhattan.

At his political peak, on the threshold of the vice presidency, Mr. Lieberman — a national voice of morality as the first major Democrat to rebuke President Bill Clinton for his sexual relationship with the White House intern Monica Lewinsky — was named Mr. Gore’s running mate at the Democratic National Convention that August in Los Angeles. He became the nation’s first Jewish candidate on a major-party presidential ticket.

In the ensuing campaign, the Gore-Lieberman team stressed themes of integrity to sidestep the Clinton administration’ scandals, and Mr. Lieberman urged Americans to bring religion and faith more prominently into public life.

The ticket won a narrow plurality of the popular votes — a half-million more than the Bush-Cheney Republican ticket. But on the evening of Election Day, no clear winner had emerged in the Electoral College, and an intense legal struggle took center stage.