John Dingell, a gruff Michigan Democrat who entered the U.S. House of Representatives in 1955 to finish his late father's term and became a legislative heavyweight and longest-serving member of Congress, died on Thursday. He was 92.

The former lawmaker's wife, Debbie Dingell, who was elected to succeed him, was with him when he died peacefully at home in Michigan, her office said.

"He was a lion of the United States Congress and a loving son, father, husband, grandfather, and friend. He will be remembered for his decades of public service to the people of Southeast Michigan, his razor sharp wit, and a lifetime of dedication to improving the lives of all who walk this earth," Debbie Dingell's office said.