Answer:
It is still a controversial issue because: Immigration commes with cultural diversity and this rases cultural changes.
Explanation:
Immigration is still controversial because not everyone is open to the diversity and the changes that a new culture brings. Often what is different creates uncertainty and people prefer to stay with what they think is familiar or what they are use to. Social and cultural diversity means the acceptance of what is different from once culture, this generates controverial issues.
Federalism is a government in which powers are divided between state governments and a federal government
Every ten years after the census has been conducted and gives them an idea of how many people one person will represent a whole community of people in Washington
The expression means my house is your house