It’s a nightmare that could all too easily come true: the Republican Party denies Donald Trump the nomination, he bolts, and Hillary Clinton, unindicted by a sympathetic Obama Justice Department, becomes president. If she does, it is virtually certain that the Obama administration’s lackadaisical and fantasy-based response to the jihad threat would continue.Hillary made that clear Tuesday morning in her response to the latest jihad terror attacks in Brussels, in which at least 28 people were killed.The mass murders were “deeply distressing,” she said, but the “dream of a whole, free Europe … should not be walked away from,” and...