He was 94.
His grandson, Raymond Dennis Large III, said that Laird died in Florida.
Laird left a legacy that included a telephone call that eventually played a role in one of the biggest political stories of the century, the Watergate scandal that drove Nixon from office.
Laird was Nixon's counsellor on domestic affairs in October 1973 when Nixon had to replace Vice President Spiro Agnew, who had resigned in scandal. Laird called his good friend, Michigan Republican Gerald Ford, to ask if he would be interested in replacing Agnew.
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Ford accepted. About a year later, Nixon resigned because of Watergate and Ford became president. Ford pardoned Nixon, and two years later, Ford lost the presidential election to Jimmy Carter.
"I thought Ford was the right person to bring the country together after the Watergate fiasco," Laird once said, taking credit with Bryce Harlow for persuading Nixon to pick Ford. Ford once praised Laird as a patriot before a partisan.
His grandson Large, who is the son of Alison Laird Large, called his grandfather "one of the lions of our republic." "He truly was someone that worked across party lines," Large said. "He was a very dedicated Republican but he was able to see the human in everyone. His work speaks for itself."
Laird, the son of a Presbyterian minister, was 30 when he was elected to the US House in 1952. He represented Wisconsin's 7th District, mostly dairy-farming or lumber-producing counties in central Wisconsin for nine terms, and was credited with helping spearhead the vast expansion of medical research and health facilities in the US.