Q: Dear Ethics Lawyer, I am handling a significant case in which I am preparing to argue to a federal district court in our state that a state law cause of action against our client under relatively recent legislation is preempted by federal law. I’ve just learned that one of my partners in the firm is coincidentally preparing to argue in state court on behalf of a different client that preemption does not apply.

I discovered this by accident, given that our firm (similar to other firms) does not track the specific legal arguments being made over time in individual cases as part of its conflict-checking system. Now that I know about it, what do I do? Is this an actual conflict, or something that will just be difficult to explain to the clients if they find out we are arguing both sides of the same argument at the same time?