Ted Cruz helps his daughter with her math homework. He makes time for tea with his elderly mother. He remembers birthdays, brings his wife flowers, packs her suitcase even when he‘s tired. Humanizing the candidate is supposed to be a campaign‘s building block, not its closing argument. But with just days until voting begins in the presidential race, Cruz is suddenly under siege. So the Texas Senator trotted out a special surrogate Friday to squash the storylines that may be blunting his momentum. Without Trump onstage Thursday night, Cruz had his worst debate of the cycle. On Friday, he awoke...