What was a major obstacle to drafting a new constitution at the constitutional convention of 1787?

Amain difference between state and federal courts is state courts try disputes between states, while federal courts try cases between citizens of a state. state courts try cases between citizens of a state, while federal courts try disputes between states. state courts consider the facts and law in making a decision, while federal courts consider the law, facts, and precedents. state courts consider the facts and precedents in a decision, while federal courts consider the law, facts, and precedents.