Final answer:
Maine has the least potential to change the outcome of a presidential election due to its smaller number of electoral votes compared to California and Florida.
Step-by-step explanation:
Among the options, Maine has the least potential to significantly change the results of a presidential election. This is due to its smaller population and consequently fewer electoral votes. A state like California, which has many more electoral votes due to its large population, or a swing state like Florida, which has a significant number of electoral votes and a history of close election results, could more easily sway the outcome of the election. It's important to note that the United States uses the Electoral College system to elect the president, where each state is allocated a certain number of electors based on its representation in Congress, which is in turn based on the state's population.