I think you mean "litigation", but I agree on the substance. This business must be handled by American bishops and American dioceses. The Pope's job is to encourage and support the American bishops in doing their jobs.
Americans call it "federalism".
Catholics (also) call it "subsidiarity".
It means the same thing: Do your job, let other folks do their jobs, do the job at the lowest appropriate level.
D’OH, yeah I meant litigation, but you figured it out! :o)