He described his week, punctuated by a visit the night before to the L.B.J. Presidential Library, the museum of President Lyndon B. Johnson. “One of the things that hits you,” he said, is “all of the major acts, legislation, that happened during just his presidency.” His eyes widened as he listed some: “You have the Civil Rights Act, the Voting Act, you have Medicare, you have Medicaid, you have several national parks, you have Head Start, you have housing discrimination, you have jury discrimination.” “Regardless of your politics,” he continued, “you look at it and say, ‘My gosh.’”