He showed his famous sense of humor in a 2006 commentary for NPR's "This I Believe" series, writing: "I admire enormously the candidate able to face defeat with humor and grace. Nobody ever conceded defeat better than Dick Tuck who, upon losing a California state senate primary, said simply, 'The people have spoken ... the bastards.' "

Some of his happiest moments, he said, were when he worked on political campaigns: “You think you are going to make a difference that’s going to be better for the country, and especially for widows and orphans and people who don’t even know your name and never will know your name. Boy, that’s probably as good as it gets.”

“In my Irish American Massachusetts family, you were born a Democrat and baptized a Catholic,” Mr. Shields wrote in 2009. “If your luck held out, you were also brought up to be a Boston Red Sox fan.”

Politics, he maintained, was “a contact sport, a question of accepting an elbow or two,” and losing was “the original American sin.”

Asked in a 2013 C-SPAN interview which presidents he admired, he cited Gerald R. Ford, a Republican who took office in 1974 in the wake of the Watergate scandal. Ford, he said, was “the most emotionally healthy.”“Not that the others were basket cases,” he said, but “they get that bug, and as the late and very great Mo Udall, who sought that office, once put it, the only known cure for the presidential virus is embalming fluid.”