Sen. Helms, who won election to the Senate five times before retiring in 2002, died at a nursing home in Raleigh, N.C., according to John Dodd, president of the Jesse Helms Center in Wingate, N.C. A cause of death was not given, but his family said in 2006 that he had been diagnosed with vascular dementia.

"Jesse Helms was a kind, decent and humble man and a passionate defender of what he called 'the Miracle of America.' So it is fitting that this great patriot left us on the Fourth of July," President Bush said in a statement.

Commentator Patrick J. Buchanan, speaking on MSNBC, put Sen. Helms in the company of the late President Ronald Reagan, calling the former senator "the second most important conservative of the second half of the 20th century."

A registered Democrat in the years before he ran for the Senate in 1972, Sen. Helms was not the only Southerner of his generation to defect to the Republicans after his party championed the cause of civil rights and, as he put it, "veered so far to the left nationally." Nor was he, at his death, the only politician defending the traditional values of a rural South that had long since been suburbanized.

But Sen. Helms will be remembered as different from his contemporaries in that he was unyielding on issues that were important to him. Unlike other conservatives, such as former Mississippi Sen. Trent Lott or former Georgia Rep. Newt Gingrich, who fought for their causes but found ways to reach accord with Democrats, Sen. Helms seldom gave in.

"Compromise, hell!" Sen. Helms wrote in 1959.

Unlike other symbols of segregation - such as Alabama's Gov. George C. Wallace and South Carolina's longtime Sen. Strom Thurmond, who recanted their opposition to racial integration - Sen. Helms held firm. He rarely reached out to black voters, who in the 2000 census represented nearly 25 percent of North Carolina's population.

The key to Sen. Helms' longevity was a political strategy that allowed him to win election without appealing to the mainstream. The use of direct mail to solicit campaign funds nationally was pioneered in the 1960s, but he perfected the approach. He sought campaign contributions from conservatives nationally, then used their money to air inflammatory advertisements that energized the passions of his conservative base at home.

"He needed the white vote to win," said Merle Black, a professor of political science at Emory University. "To get that, he had to use explicit racial themes. His was a kind of primitive conservatism."

Sen. Helms never won with more than 56 percent of the vote, but he maintained a devoted core constituency.

"He was a loud and clear voice for muscular, principled conservatism," said Whit Ayres, a pollster for many Southern candidates. "He was ideologically consistent, and he didn't bend with the wind."

Often he was the lone voice of dissent in a Senate of 100 often like-minded members. He fought his Republican colleagues as often as his Democratic counterparts.

He was one of two Republicans to vote against confirming Henry A. Kissinger as secretary of state during the Nixon administration. And he conducted a 16-day filibuster against making the Rev. Dr. Martin Luther King Jr.'s birthday a national holiday, taking to the Senate floor to decry the assassinated King, a pacifist and civil rights leader, for what Helms deemed his "action-oriented Marxism."

Sen. Helms often prevailed by sheer stubbornness, wearing down opponents. As chairman of the Senate Foreign Relations Committee in the 1990s, he held up U.S. dues to the United Nations until the bureaucratically overgrown agency slimmed down.

Jesse Alexander Helms Jr. was born Oct. 18, 1921, in Monroe, N.C., a small town southeast of Charlotte in the Piedmont region. His father served as police chief of Monroe. Helms attended Wingate Junior College and Wake Forest University but did not graduate.

One of his first jobs after leaving college was as a sportswriter for the Raleigh News & Observer. There he met Dorothy Coble, the paper's society reporter. The couple married in 1942.

During World War II, he served stateside in the Navy as a recruiter. After the war, he became city editor of the Raleigh Times and wrote columns reminiscing about his upbringing in the segregated South.

From the beginning, Sen. Helms was schooled in the political trick of using race to scare white conservatives to the polls.

In 1953, he worked for the North Carolina Bankers Association, turning the group's monthly magazine into a platform for his political views. He found his real calling as a nightly television commentator for WRAL in North Carolina, a post he had from 1960 to 1972.

Persuaded by conservative voters to run for the Senate, he continually showcased the campaign tactics that would mark his career.

Perhaps the most infamous Helms race was in 1990, when he ran against Harvey Gantt, a black architect and former mayor of Charlotte. The campaign became notorious among strategists for a television ad showing a white man's hands crumpling a rejected job application as a voice intoned: "You needed that job. And you were the best qualified. But they had to give it to a minority because of a racial quota. Is that really fair? Harvey Gantt said it is."

The ad had an immediate effect. "Gantt was leading until that ad," recalled Emory University's Merle Black. "His people were really brokenhearted." Gantt lost that election as well as a rematch six years later.

He is survived by his wife of 65 years and three children, all of North Carolina.