“…It has been shown that presidents can exert substantial control over political environments (John et al, 2007). Presidents often use their office to publicize issues (Canes-Wrone, 2001) and to increase popular support for their policy proposals (Barrett, 2005(Barrett, , 2007Edwards & Wood, 1999;Kernell, 1997;Mayhew, 1974;Young & Perkins, 2005). Presidential speeches increase the public's attention towards the issues they address (Cohen, 1995(Cohen, , 1997Hill, 1998).…”