Former Secretary of State John Kerry claimed ignorance of Hunter Biden’s work with Burisma Holdings, a Ukrainian natural gas conglomerate, on Sunday—despite evidence to the contrary from Obama administration officials and even his own stepson. Kerry, who recently endorsed Joe Biden’s White House bid, was asked about the topic while campaigning with the former vice president in New Hampshire. In particular, Kerry was questioned if he knew about the younger Biden’s decision to join Burisma’s board of directors in 2014 and if he was “comfortable with the arrangement” as secretary of state. “I had no knowledge about any of that,...