Some of Sarah Palin’s riskiest endorsements scored major victories Tuesday for the former Alaska governor, showing off her power in Republican primaries. Palin had four primary endorsements in play – Carly Fiorina, Nikki Haley, Terry Branstad and Cecile Bledsoe – and three won or moved on to a runoff. Palin served different roles for each candidate – sometimes spotlighting conservatives not well known to the national scene while at others validating conservative credentials to an unsure grassroots and even stepping in to deflect nasty attacks. Perhaps Palin’s most powerful demonstration came in South Carolina, where her endorsement propelled a major...