Shields, who died of complications from kidney disease at his home in the Washington suburb of Chevy Chase, Maryland, was known for his wit and his genial presence on television, where he hosted "The Capital Gang" on CNN and appeared frequently on PBS' news programming.

He provided weekly political analysis and commentary for the PBS "NewsHour" from 1988 to 2020.

Born in the Boston suburb of South Weymouth, Massachusetts, in 1937, Shields was steeped in the New Deal political values of his family, and read as many as five newspapers a day. He earned a bachelor's degree from the University of Notre Dame in 1959, then served in the Marines for two years.

After a few years working in the TV industry in Los Angeles, Shields moved to Washington. He became a top Democratic strategist, directing winning election campaigns before turning to political commentary. He joined the editorial board of The Washington Post in 1979 and in time became a syndicated columnist who soon was in demand on TV and at conferences.

Almost like the swallows returning to Capistrano, rare was the Catholic Social Ministry Gathering in Washington that did not feature Shields talking about contemporary political topics.

In 2004, he suggested that likely Democratic presidential nominee John Kerry spend the next six months in a Benedictine monastery because it would leave President George W. Bush as the only visible candidate on whom attention could focus. "If the election becomes a referendum on Bush, Kerry can win," Shields said. "If it's a referendum on Kerry, Bush can win."

The year before, as war loomed with Iraq for the second time in 12 years, Shields, criticized what he called a "spectator-sport" aspect of the current situation, in which he said only one member of a Congress who was backing the administration's push toward war had a child serving as an enlisted member of the military.
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"The strength of any nation will be determined by its will and resolve to stand together for common sacrifice," he said.

But the rich and powerful people of the United States aren't even being asked to sacrifice a tax cut, he said, let alone risk the lives of their sons on the front lines of battle. "Too often in recent American politics, the question is, 'Are you better off today than you were four years ago?'" Shields said. "The question we should be asking is, 'Are WE better off?'

Shields was an admirer of Pope Francis. In 2015, more than six months prior to the Pope's U.S. visit, he said, the pontiff "has a message which makes both sides uncomfortable." The papal address to a joint session of Congress is "going to be unlike any State of the Union address we've ever see," he added.

He imagined watching "(then-Vice President) Joe Biden and (then-House Speaker) John Boehner, both Catholics (but from different political parties, Democratic and Republican, respectively), figuring out when to stand and applaud."

In 2014, a month before Pope Francis and then-President Barack Obama were to meet at the Vatican, Shields said he hoped the summit would provide a chance for Obama to learn something.

"If there's an anti-insular Pope, Pope Francis embodies that," he said, while quickly turning his observation into a jab against Obama, whose contacts, he said, "are limited to those in the 312 area code," meaning Chicago. Shields said the Pope was a natural communicator and someone who has "brought a sense of communion and communication unrivaled in my lifetime."

But Shields, as frequent a guest as he was at the Catholic Social Ministry Gathering, did not limit his appearances to that forum.