Mark Shields, a piercing analyst of America’s political virtues and failings, first as a Democratic campaign strategist and then as a television commentator who both delighted and rankled audiences for four decades with his bluntly liberal views and sharply honed wit, died on Saturday June 18 2022 at his home in Chevy Chase, Md. He was 85. His daughter, Amy Shields Doyle, said the cause was complications of kidney failure. From 1988 until it was canceled in 2005, he was a moderator and panelist on “Capital Gang,” a weekly CNN talk show that matched liberals like Mr. Shields with their conservative counterparts. He was also a panelist on another weekly public affairs program, “Inside Washington,” seen on PBS and ABC until it ended in 2013. His longest stretch was as a commentator on “PBS NewsHour” from 1987 through 2020, when he decided at age 83 to end his regular gig. At the University of Notre Dame he majored in philosophy and graduated in 1959. He met Anne Hudson, a lawyer and federal agency administrator. They were married in 1966. In addition to his daughter, a television producer, he is survived by his wife and two grandchildren.