With FBI Director James Comey’s statement this week that the massive investigation of possible criminality by former Secretary of State Hillary Clinton could linger into the fall, some of her political advisers have become convinced that the best option for her would be to shut it down now, which could be accomplished if President Obama would grant a preemptive pardon for any crimes she may have committed. “It would be a humbling experience for Mrs. Clinton to accept a pardon, but she and husband Bill have ridden out terrible scandals in the past without losing their bedrock constituencies,” an official...