International Politics

{Diversionary theory of war asserts that leaders have incentives to start a foreign crisis to distract the public regarding the existing domestic issues.}
1.Would an attempt by a US president to start a war to generate a rally effect be effective or not? Please provide an example supporting your arguments.
2. What elements of society, the media, and the government might undermine an attempt to create a rally effect? Again, please provide an example supporting your arguments.