Long before she was a Fox News host who pushed pro-Trump election conspiracy theories, Jeanine Pirro was an ambitious New York politician whose career stalled after she was recorded plotting to bug her then-husband’s boat to catch him in an affair. The revelation rocked Pirro’s campaign for New York attorney general nearly 20 years ago, resulting in days of front-page headlines in the city’s tabloids (“BUG THIS LOVE BOAT!” blared the Daily News cover). The conversation took place in 2005 between Pirro and the former commissioner of the New York Police Department, Bernard Kerik, a close ally of Rudy Giuliani’s....