Former Assembly Speaker Fabian Núñez, who served as both Democratic foil and dealmaker with Gov. Arnold Schwarzenegger, has joined the high-powered public relations firm whose California office is currently occupied by Schwarzenegger's former campaign manager and communications director. Núñez, a Los Angeles Democrat, will be the newest partner and co-chair of Mercury Public Affairs, LLC, a political firm with offices in seven cities across the country, according to a letter he has sent to supporters. Steve Schmidt, who was the architect of Schwarzenegger's reelection campaign, and Adam Mendelsohn, the governor's former communications director and deputy chief of staff, are the...