Is Eric Alterman spinning out of control? After his arrest last night at the Democratic presidential debate in New Hampshire, where the cops cuffed him in a gymnasium “spin room” at Manchester's St. Anselm College and hauled him down to the police station for allegedly trespassing at a private party, maybe Alterman’s friends and family should be concerned that he’s becoming the aging-pundit answer to Lindsay Lohan. The lefty commentator has a taste for mayhem, if only, until now, of the verbal variety. Over the past two decades, worried Alterman watchers have felt growing alarm as his pugnacity and all-around contrariness have escalated to potentially aneurysm-inducing levels. Indeed, when this reporter once shared a subway ride with him from the Upper West Side, he announced: “I am so fucking angry about the war in Iraq, I think I’m going to explode.” This reporter’s reply: “That’s fine, Eric, but if you’re going to explode, do you mind waiting till I get off the train?”