The National Court of Spain has issued an arrest warrant for three American soldiers in relation to a seven-year-old incident in Iraq. The US Army concluded years ago that the soldiers had acted properly. Moreover, the incident has nothing whatsoever to do with Spain. Nevertheless, Spain has given itself the authority to prosecute any supposed crime anywhere in the world, under their doctrine of universal jurisdiction.
Naturally, the United States (even under this administration) is not likely to extradite the soldiers. Still, this means that the three can never travel to Spain, or anywhere else in the world that might be less reticent to extradite them.
Americans ought to withhold their business from Spain as long as Spain persists in persecuting American soldiers. But Michelle Obama clearly doesn’t see it that way.