Famous for gazing over eyeglasses worn on the end of his nose, Carl Levin seemed at ease wherever he went, whether attending a college football game back home in Michigan or taking on a multibillion-dollar corporation before cameras on Capitol Hill.

Michigan’s longest-serving U.S. senator had a slightly rumpled, down-to-earth demeanor that helped him win over voters throughout his 36-year career, as did his staunch support for the hometown auto industry. But the Harvard-educated attorney also was a respected voice on military issues, spending years leading the powerful Senate Armed Services Committee.

Despite his record tenure and status, he kept his role in perspective. At his direction, the portraits of all 38 senators who had served before or with him since Michigan’s statehood in 1837 were hung in his office conference room. Two empty spaces were reserved for future senators.

“I’m part of a long trail of people who have represented Michigan,” Levin said in 2008. “I’m just part of that history. The people coming after me … can pick up where I leave off, whoever they might be.”

The former taxi driver and auto-line worker, who for decades kept his faded 1953 union card in his wallet, died Thursday at 87. His family and the Levin Center at Wayne State University’s law school did not release a cause of death in an evening statement. He had been living with lung cancer since age 83.

“We are all devastated by his loss. But we are filled with gratitude for all of the support that Carl received throughout his extraordinary life and career, enabling him to touch so many people and accomplish so much good,” the statement said.

First elected to the Senate in 1978, Levin represented Michigan longer than any other senator, targeting tax shelters, supporting manufacturing jobs and pushing for military funding. His tenure was a testament to voters’ approval of the slightly rumpled, down-to-earth Detroit native whom Time magazine ranked among the nation’s 10 best senators in 2006.

A Washington insider and former prosecutor known for his professorial bearing, Levin took a civil but straightforward approach that allowed him to work effectively with Republicans and fellow Democrats. He was especially astute on defense matters thanks to his years as the top Democrat on the Senate Armed Services Committee.

Carl Levin was Michigan’s only Jewish senator. He once said that public service was in his DNA, and politics often was discussed at the dinner table when he was a boy.

(With AP inputs)