For a time, it seemed that Sarah Palin was on a hot streak. Her Republican primary endorsements were generally winners as she racked up favors, praise and credit for the results in across the country. There's still no doubt that a Palin endorsement raises a candidate's profile, significantly. But now, after a string of defeats for Palin endorsees, the question has to be asked: Was Palin’s brand really so strong that she was swinging primaries in her favor? “I have said pretty consistently that these endorsements are fairly meaningless,” said Republican strategist John Feehery. “They were meaningless when Palin was...