One of the fundamental principles of the U.S. Constitution is the doctrine of federalism, which means that the powers of the federal government and the states are divided and shared. The Constitution also establishes the supremacy of federal law over state law, which means that when there is a conflict between the two, federal law prevails. However, this does not mean that states cannot sue each other in some cases. The Constitution grants the U.S. Supreme Court original jurisdiction over controversies between two or more states, which means that the Court can hear and decide such cases directly, without any lower courts involved. States can sue each other for various reasons, such as boundary disputes, water rights, environmental issues, or enforcement of contracts.
However, states cannot sue each other to impose or enforce their own laws on another state. This would violate the sovereignty and autonomy of each state, as well as the principle of comity, which means that states should respect and defer to each other's laws and policies. Therefore, if one state wants to sue another state to get it to enforce the laws of the first state, the Court would likely dismiss the case for lack of jurisdiction or merit.