Police and political insiders remain stumped after the Watergate-style burglary Saturday at the Manhattan campaign headquarters of GOP presidential hopeful Malcolm "Steve" Forbes. "We're treating it as a typical break-in, a regrettable fact of urban life," Forbes campaign spokeswoman Gretchen Morgenson assured the Associated Press. "Until we know otherwise, that's what we're going to assume it is." There is ample fodder for conspiracy theorists nonetheless. The perpetrators removed a fax machine and a copying machine, left a computer and printer on and rifled through computer disks with lists of prospective Forbes supporters.