In The Presidential Road Show: Public Leadership in an Era of Party Polarization and Media Fragmentation, Diane J. Heith evaluates presidential leadership by critically examining a fundamental tenet of the presidency: the national nature of the office. The fact that the entire nation votes for the office seemingly imbues the presidency with leadership opportunities that rest on appeals to the mass public. Yet, presidents earn the office not by appealing to the nation but rather by assembling a coalition of supporters, predominantly partisans. Moreover, once in office, recent presidents have...