The document discusses several key points about the relationship between presidents and public opinion:
1) Presidents try to use going public strategies to promote their policies directly to Americans, but are often unsuccessful as public opinion moves away from presidential policies over time.
2) Presidents have more influence over public opinion in the short term after elections, when approval ratings are very high, and when their party controls Congress.
3) Events like casualties in war can influence public opinion, but elites and news coverage shape how the public interprets events, so presidents have significant control over these interpretations and therefore public opinion.