The modern media effectively perform four significant roles: those of signaler, common-carrier, watchdog, and partisan advocate. The signaling role requires the press to bring relevant events and problems into public view. In its common-carrier role, the press serves as a channel through which political leaders can address the public. The watchdog role requires the press to scrutinize official behavior and uncover evidence of deception, carelessness, or corruption. Finally, the press functions as a partisan advocate. Although the traditional media perform this function to a degree, the newer media (the talk shows and blogs) specialize in it.