Identify and explain two constitutional principles that allow government to be flexible

Two constitutional principles that allow government to be flexible are
1) Federalism and devolution 
2) Elastic Clause

Federalism makes the government flexible by dividing the responsibilities and balancing the power between federal government state and local government through the process of devolution.
Elastic Clause allows the congress to make those laws which specifically are not mentioned in the constitution and this all allows the flexibility of the government. 

answer; /// (culture);

the anti federalists was a movement that was opposed to the creation of a us federal government. although they were not as organized as the federalists, they also had a large group of leaders, especially in state politics.

the statement "now, in a large extended country, it is impossible to have a representation, possessing the sentiments, and of integrity, to declare the minds of the people” represents the concerns of the anti federalists.

they strongly believed that the federalists were representing the interests of aristocratic elements of society at the expense of the majority of ordinary people, who lived in a rural society.

their fear for the creation of a strong federal government and the president’s power of veto in their opinion would create a tyrannical rule that would dominate the people. they defended the importance of restraining the government’s power towards people at any cost.