Daniel McCarthy's essay discusses how wars have impacted the dominance of the two major US political parties over time. McCarthy argues that while two parties exist, usually only one truly governs at a time. He claims the Vietnam War hurt Democrats in 1969 similar to how the Iraq War damaged Republicans. The author agrees with some of McCarthy's points but disagrees that the wars themselves had the greatest impact, arguing that media coverage of the wars was more influential. Overall, the response praises McCarthy's essay for providing historical perspective on how wars shape perceptions of political parties, though questions some of his specific analogies and conclusions.