Newark Mayor Cory Booker (CNN Photo) by Dan Merica WASHINGTON (CNN) -- Cory Booker already had a national identity before he decided to run for senator. The media-savvy, tweet-happy mayor from Newark -- who easily won the New Jersey Democratic primary for Senate last Tuesday -- has been known for his man-of-the-people streak, charismatic presence and social media intensity, or as some say, fixation.
