When was the last time anyone heard of a Republican National Committee opposition researcher moving into a job as U.S. Attorney (for the Eastern District of Arkansas -- where you'd never have access to any opposition research on, say, Hillary Clinton, should that have become necessary), and then moving back to the RNC as an opposition researcher (once it was obvious that being perched in Arkansas was no longer of any interest)?
Nothing to see here. Move along. No need to actually enforce that subpoena against Karl Rove. Or, for that matter, this other one that's been laying around for a year.