Before he goes to sleep, between 11 and midnight, Dan Pfeiffer, the White House communications director, typically checks in by e-mail with the same reporter: Mike Allen of Politico, who is also the first reporter Pfeiffer corresponds with after he wakes up at 4:20. A hyperactive former Eagle Scout, Allen will have been up for hours, if he ever went to bed. Whether or not he did is one of the many little mysteries that surround him. The abiding certainty about Allen is that sometime between 5:30 and 8:30 a.m., seven days a week, he hits “send” on a mass e-mail newsletter that some of America’s most influential people will read before they say a word to their spouses.