Saying that he had used ''a poor choice of words,'' Trent Lott, the Senate Republican leader, apologized tonight for his speech at the 100th birthday party of Senator Strom Thurmond, which critics had said was an implicit endorsement of segregation.
''A poor choice of words conveyed to some that I embraced the discarded policies of the past,'' Mr. Lott said in a statement. ''Nothing could be further from the truth, and I apologize to anyone who was offended.''
Earlier in the day, Mr. Lott had issued a statement that stopped short of an apology, saying his comments were made in the spirit of ''a lighthearted celebration.'' His later expression of contrition came after a reporter pointed out to his office that former Vice President Al Gore had called on him to apologize. Mr. Lott's spokesman said the apology was not in response to Mr. Gore but came solely ''out of personal concern for this misunderstanding.''
At issue are three sentences in Mr. Lott's tribute last Thursday to Mr. Thurmond, a South Carolina Republican who ran for president in 1948 on a Dixiecrat platform opposing ''social intermingling of the races.'' With Mr. Thurmond by his side, Mr. Lott, Republican of Mississippi, said:
''I want to say this about my state: When Strom Thurmond ran for president, we voted for him. We're proud of it. And if the rest of the country had followed our lead, we wouldn't have had all these problems over all these years, either.''
The comments brought complaints from both sides of the political aisle.
The Rev. Jesse Jackson called on Mr. Lott to resign as Republican leader. Representative John Lewis, a Georgia Democrat and leader of the civil rights movement, said he was ''shocked and chagrined.'' William Kristol, editor of The Weekly Standard, a conservative magazine, said Mr. Lott had been ''thoughtless.''
Mr. Gore, in a television interview today, accused Mr. Lott of making ''a racist statement,'' and called for the Senate to censure him unless he apologized.
Mr. Lott had begun the day by telling his Democratic counterpart, Tom Daschle, that his remarks about Mr. Thurmond had been misconstrued.
Then in a statement he said, ''My comments were not an endorsement of his positions of over 50 years ago, but of the man and his life.''
One politician who pointedly declined to join in the criticism was Mississippi's Democratic governor, Ronnie Musgrove, who was in Washington today for a meeting of the Democratic Governors' Association.
''I'm sure Senator Lott was just caught up in the excitement of the celebration of Senator Thurmond's birthday,'' Mr. Musgrove said at a lunchtime interview with New York Times reporters and editors.
When pressed, Governor Musgrove carefully repeated his comment, word for word.