Each states needs there own constitution for a few reasons. It is to tell them apart and make them what they are.
establish its own constitution
In Australia each state and territory has its own set of Constitutional Laws that are legally binding to the original Constitution. Laws can be changed according to the constitution if the High Court can deem the State or Territory law unconstitutional.
Each state in the US has it's own constitution, and it's own supreme court.
Yes, each state has its own individual constitution, but they all comply with the United States constitution.
Yes and Yes. The US Constitution applies to all the states. Each state has its own constitution that applies to that state. The state cannot contradict anything in the US Constitution, but they can add things that they feel are missing, or have more stringent requirements for certain things. And the state's constitution sets up and defines the government that will rule the state.
Each state held its own ratifying convention
Could impose its own tariffs
This would depend entirely on which state is involved. For some states, the legislature and governor can amend the constitution, or the people can amend it with an initiative. Each state has its own process.
Every state has its own constitution.
According to the Constitution the President of the United States is elected based on the votes cast from each state. Each political party chooses their own candidate to represent them.
Federalism contributed to economic and political differences among the states because it allowed each state freedom to make its own laws. Each state was also able to draft its own constitution.
Yes, each state has its own constitution. The US Constitution sets aside certain rights and responsibilities to the states and so the management of those items, as well as the set up of the state government needs to be codified.