Mr. McCain’s selection of an inexperienced and relatively unknown figure was unsettling, and the campaign’s decision to keep her sequestered from serious interchanges with reporters and voters serves only to deepen the unease. Mr. McCain is entitled to choose the person he thinks would be best for the job. He is not entitled to keep the public from being able to make an informed assessment of that judgment. Ms. Palin’s speech-making skills are impressive, but the more she repeats the same stump speech lines, the queasier we get. Nor have her answers to the gentle questioning she has encountered provided any confidence that Ms. Palin has a grasp of the issues.