It made him more compassionate and understanding because he knew how it felt to struggle with an illness. And he knew what the people needed and how to help because he was in a similar situation.
Sorry about the grammar.
<span>"President Johnson's escalation of the Vietnam War after the Tonkin Gulf Incident" is the historical event most useful to include in a speech regarding power in the executive branch.</span>
Answer: The stong nationalism of the Serbians.
Explanation: The Serbians were against plans of Austria-Hungary to colonize their land.
The answer above is correct ^