Answer:
They wanted to preserve slavery since it was the foundation of their economy. For most plantation owner it would mean their way of life would be taken away from them.
Some Federalists were afraid the new comers were going to change the government.
That everyone has the right to life liberty and property.(some versions substitute property for the pursuit of happiness but the final version was property)
To serve as president, one must: be a natural-born U.S. citizen of the United States; be at least 35 years old; be a resident in the United States for at least 14 years.