Final answer:
The question does not provide enough information to determine the percentage of Americans who would vote for the incumbent.
Step-by-step explanation:
Polling is a method used to gather information or opinions from a group of people. It involves asking questions to a sample of individuals, known as respondents, to collect data on their views or preferences. Polling is commonly used in various fields, including politics, market research, social sciences, and more.
The question is asking about the percentage of Americans who would vote for the incumbent. However, no specific poll is mentioned in the question. Therefore, it is not possible to determine the exact percentage of Americans who would vote for the incumbent based on the information provided.